Comprehensive Environmental Impact Assessment Research Articles

Molecular properties of dissolved organic matter leached from microplastics during photoaging process

The occurrence of dissolved organic matter (DOM) derived from microplastics (MPs) and its effect on aquatic systems has attracted great interest recently. However, the photoaging effect on the molecular structure of MP-derived DOM (MP-DOM) remains unclear. This paper presents the characteristics of DOM leached from three commercial MPs, i.e., polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET) under UV irradiation. With prolonged aging periods, the surface roughness and oxygen-containing groups on the surface of MPs increase as more DOM leachate is generated. Moreover, the dissolved organic carbon (DOC) content of the leached DOM from PET MPs varies from 0.52 mg/L to 2.25 mg/L, which is higher than PE and PP MPs, due to the larger increased surface reaction area and the cleavage of the benzene ring. According to the excitation-emission matrix and parallel factor analysis (EEM-PARAFAC), the plastic-derived protein/phenolic-like components (C1 and C3) in MP-DOM were changed into photo-induced humic-like components (C2), which were closely related to the intermediates during photo-oxidation. High-performance liquid chromatography-mass spectrometry (HPLC−MS) analysis further identified that the highest proportion of antioxidants (24.8 %∼34.6 %) was contained in MP-DOM. Plasticizers, intermediate additives, and antimicrobial agents were also detected in DOM leachate. Correlation analysis identified that the composition of leached DOM was positively correlated with the surface roughness, the carbonyl index (CI), and the chemical groups of MPs. Moreover, a partial least square structural equation model (PLS−SEM) analysis further verified that the change of morphology and the chemical structure of MPs could affect the DOM structures and fractions directly. This study provides an in-depth understanding of the composition of MP-derived DOM during the aging process, as well as a comprehensive environmental impact assessment of MPs.

Cumulative collision risk and population-level consequences of industrial wind-power plant development for two vulture species: A quantitative warning

Prioritizing renewable energy generation over the conservation of natural habitats and species on a large spatial scale, leads to the paradox of impacting biodiversity to mitigate climate change. In this study, we aim at quantifying the long-term demographic impact of the excess mortality caused by collisions with wind turbines on the populations of two vulture species of conservation concern. Using long-term monitoring data and Integrated Population Models (IPMs), we quantified demographic parameters and projected population trends under various wind power development scenarios. Our findings indicate that even under our most optimistic scenarios, annual collision mortality could reach up to 30 % of the current Cinereous vulture population and 7 % of the Griffon vulture population. Without further wind power expansion, both vulture populations are predicted to remain stable or increase over the next 20 years. However, the addition of 85 wind turbines is likely to drive the Cinereous vulture to local extinction within 18 years and significantly slow the growth of the Griffon vulture population. Scenarios involving larger numbers of turbines could result in the extinction of both species within two to five years for Cinereous vultures and up to 20 years for Griffon vultures, depending on space use intensity. Our results underscore the vulnerability of long-lived species to excess mortality and highlight the need for comprehensive Environmental Impact Assessments (EIAs) that incorporate population dynamics analyses. Effective conservation strategies must include rigorous pre- and post-construction monitoring, the availability of monitoring data, and cumulative impact assessments that consider the entire foraging range of these species. Additionally, strategic planning to avoid critical vulture habitats and implementing mitigation measures in buffer zones are essential. This study emphasizes the necessity of integrating biodiversity considerations into renewable energy planning to balance the goals of energy production and wildlife conservation.

Assessing the sustainability of Blue Economy activities using an ecosystem and life cycle-based approach: Possibilities, challenges and implications for an informed policy making

The global ocean faces increasing exploitation to meet the demand of a rapidly growing globalisation. Human marine activities are leading to local environmental pressures/benefits, for example on marine ecosystems and their services, but also through their value chains on terrestrial ecosystem services, and to global pressures such as global warming. Effective management of marine activities is essential for the conservation of the natural environment. There is a growing need for holistic sustainability assessment tools capable of quantifying environmental impacts at various geographical scales, alongside evidence-informed policies. This study examines the evolving marine policy landscape, identifies key legislation that supports the sustainable growth of the Blue Economy, traces its historical development, and explores the integration of ecosystem services assessment and life cycle assessment as methodologies for assessing environmental sustainability within this legislation. The review shows that current legislation falls short in providing instructions on how to measure sustainability impacts in a consistent way, i.e., which methods/indicators to use. Therefore, this study supports evidence-informed policy-making by proposing a quantitative and comprehensive environmental sustainability impact assessment methodology, integrating both ecosystem and life-cycle based methods, to a Belgian multi-use case study involving offshore wind energy and mussel farming. Considering the impacts that were possible to assess and the limits of the methodology used, the value of the positive impacts of the MUOF was +61.3 M€ y−, while the negative ones were −4.0 M€ y−1, resulting in a net handprint of +57.0 M€ y−1, primarily attributed to the benefits of the local ecosystem service ‘offshore renewable energy’ However, such a solution is not necessarily scalable, due to cumulative impacts. An analysis was conducted to identify areas for enhancing the methodology to more effectively meet policy needs. The study highlights the importance of using scientifically grounded methods to inform policy decisions.

Enhancing solar still performance with hybrid nanofluid: a comprehensive assessment of energy, exergy, economics, and environmental impact using a novel fractional model

Enhancing solar still performance with hybrid nanofluid: a comprehensive assessment of energy, exergy, economics, and environmental impact using a novel fractional model

Comparative analysis of solar module configuration and tracking systems for enhanced energy generation in South Sakucia Union, Bhola, Bangladesh: A software based analysis

Bangladesh is blessed with an extensive range of solar energy generation possibilities; however, the primary impediment to attaining its full potential in the solar energy industry is the inadequate budget in the energy sector. As a result, determining the most economical and efficient solar module configuration for each specific scenario has become a critical necessity. This study offers a comprehensive techno-economic analysis and environmental impact assessment of four distinct solar modules: monofacial, bifacial, dual-axis solar tracker, and seasonal tilt solar module, in an open area of South Sakucia Union, Bhola district, in the southwest part of Bangladesh. By integrating energy-generation capabilities, financial metrics, and environmental benefits, this research provides a holistic evaluation framework to ensure optimal economic performance and minimal adverse environmental effects for sustainable solar solutions in Bangladesh. Utilizing PV*SOL, PVsyst, and System Advisor Model (SAM) software, this study assesses energy-generation capabilities and economic viability. Despite the dual-axis solar tracker exhibiting the highest average energy generation (149,070.3 kWh/year), its higher initial cost renders it less financially viable compared to other configurations. Financial metrics reveal that the seasonal tilt configuration is the most cost-efficient, with the lowest Levelized Cost of Electricity (LCOE) at $0.0452/kWh and the highest Net Present Value (NPV) of $52,887.70. Additionally, it has the shortest Discounted Payback Period (DPBP) at 12.69 years, a favorable Internal Rate of Return (IRR) of 9.460 %, and a Profitability Index (PI) of 1.459, indicating robust returns on investment. These findings emphasize the importance of considering both energy-generation capabilities and financial metrics when evaluating solar module configurations in the southern part of Bangladesh, serving as a valuable reference for policymakers. Moreover, meticulous environmental impact assessments assist in choosing configurations with minimal adverse effects on the environment.

Analysis of the sustainability index for ecologically low-input integrated farming: A comprehensive assessment of environmental, economic, and social impact

A comprehensive sustainability index was designed in this study to evaluate the effectiveness and environmental impact of ecologically low-input integrated farming systems. By integrating diverse agricultural practices while minimizing reliance on external, non-renewable resources, this approach aims to enhance ecological harmony and sustainability. The index provides a multi-dimensional assessment, encompassing environmental, economic, and social aspects, to gauge the overall sustainability of these integrated farming practices. The procedure involved defining critical sustainability criteria across environmental, economic, and social dimensions, collecting relevant data on farming practices, and constructing a model to assess and score these practices. The index was validated through real-world applications and engaged with various stakeholders for insights and practical verification. Environmental data involves measuring soil nutrients (5 %), water usage (500 gallons/acre), and biodiversity (30 species/acre) to assess the ecological impact of farming practices. Economic data focuses on recording crop yields, input costs, and market prices to evaluate the financial viability of these practices. Social data is collected through surveys on labor practices, job satisfaction, and community impact, providing insights into the social implications and acceptability of the farming methods. The data revealed that the farming system aligned well with sustainability benchmarks, exhibiting no deviation from optimal levels in soil nitrogen content and water usage. Strong profitability and input cost efficiency were observed in the economic dimension, with a net income per acre of $400/acre and an input cost efficiency of 50 %. In the social aspect, although reasonably scored, specific labor metrics and regional/industry standards were lacking for a comprehensive evaluation. Overall, the farming system demonstrated commendable sustainability practices, with an environmental score of 7.5/10, an economic score of 8/10, and a social score of 7/10, suggesting potential for further improvements, particularly in addressing social sustainability factors.

Innovative pilot-scale process for sustainable rare earth oxide production from coal byproducts: A comprehensive environmental impact assessment

This study developed a pilot-scale process feeding with two different materials resulting from a column leaching process and acid mine drainage (AMD) streams to recover rare earth elements (REEs). A life cycle assessment (LCA) study was done to evaluate the environmental impacts of rare earth production from deleterious material in the form of highly contaminated leachate (HCL) and low-contaminated leachate (LCL). The results indicate that the main contributors to environmental categories that produce RE-hydroxide stages are NaOH and electricity. Also, oxalic acid, Na2CO3, and hydrochloric acid significantly contribute to the production stage of individual rare earth oxides (REOs), including solvent extraction (SX) and precipitation steps. The HCL route has higher environmental impacts than LCL due to higher chemical/energy and H2SO4 usage, so 468 and 292 kg of carbon dioxide are generated to produce 1 t of individual REOs from HCL and LCL routes, respectively. Moreover, the carbon dioxide emitted from the process, including the RE-hydroxide production, SX, and REOs production, is less than 10 t CO2. A sensitivity analysis was also performed to assess the changeability of the environmental footprints of the main inputs in the SX process, as the main stage has a higher contribution to the whole process. This LCA study is the first step toward understanding the environmental influence of new processing methods to produce REEs from coal by-products through a developed pilot-scale process.

Comprehensive environmental impact assessment and irrigation wastewater suitability of the Arab El-Madabegh wastewater treatment plant, ASSIUT CITY, EGYPT.

The presence of a wastewater treatment plant in the Arab El-Madabegh region, which discharges excessive amounts of raw effluent toward the nearby farming fields, is the area's main issue. Examining the harmful implications of raw effluent releases on groundwater quality, determining if treated wastewater effluent complies with regulations for discharge into the aquatic environment, and assessing irrigation appropriateness by the effluent are the main goals of this work. In order to accomplish these targets, twelve treated effluent samples from the Arab El-Madabegh wastewater treatment plant were gathered every two weeks starting in January 2012 and finishing in June 2012. They were tested to determine pH, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Temperature (Temp), Conductivity (EC), Turbidity (Turb.), Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Total Organic Carbon (TOC), NO3-, SO42-, Cl-, Ca2+, PO43-, HCO3-, Na+, Mg2+, and heavy metals such as (Fe, Mn, K+, Cr, Pb, Zn, Ni, Cu, and Cd). The outcomes revealed that all Egyptian and Food and Agricultural Organization (FAO) standards for unrestricted irrigation were met by the treated effluents, except for COD, which exceeded than the Egyptian allowed limit. The evaluation indices of the effluent's EC, SAR, PI, MR, and MH were in the low-risk category according to indicators of water quality for irrigation, nevertheless, The SSP and RSC both showed slightly higher values (67.9% and 2.76, respectively). As well, The average values of heavy metals in treated wastewater effluent were found to be below permitted limits, with the exception of lead and phosphate, which exceeded permissible limits in Egypt. The environmental sustainability (ecological friendliness) of reusing and recycling tertiary treated wastewater can be achieved in agriculture to reduce the adverse impacts on the aquatic environment.

CLIMATE RISK ASSESSMENT IN PETROLEUM OPERATIONS: A REVIEW OF CSR PRACTICES FOR SUSTAINABLE RESILIENCE IN THE UNITED STATES AND AFRICA

Climate risk assessment has emerged as a critical component in the sustainability efforts of petroleum operations, given the increasing frequency and severity of climate-related events. This paper provides a comprehensive review of Corporate Social Responsibility (CSR) practices employed in the United States and Africa to enhance sustainable resilience in the face of climate risks within the petroleum industry. In the United States, where stringent environmental regulations and public scrutiny prevail, petroleum companies have adopted a range of CSR practices to assess and mitigate climate risks. These practices encompass comprehensive environmental impact assessments, carbon footprint reduction initiatives, and the integration of renewable energy sources into their operations. The paper explores how these CSR practices contribute to the overall resilience of petroleum operations in the United States. In contrast, Africa presents a diverse landscape with varying levels of regulatory frameworks and industrial practices. The paper delves into the unique challenges and opportunities faced by petroleum operations on the African continent in managing climate risks. It highlights the role of CSR practices in promoting sustainable development, community engagement, and ecosystem conservation as integral components of climate risk resilience. The review emphasizes the importance of a holistic approach to climate risk assessment, considering both the environmental and social dimensions of petroleum operations. It sheds light on the need for collaboration between industry stakeholders, governments, and local communities to develop effective CSR strategies that enhance resilience while fostering sustainable practices. By synthesizing insights from both the United States and Africa, this paper contributes to the global discourse on climate risk management in the petroleum industry. It underscores the significance of CSR practices as instrumental tools for achieving sustainable resilience and fostering a harmonious coexistence between petroleum operations and the environment in diverse geopolitical contexts.
 Keywords: Climate Risk, Risk Assessment, Petroleum, CSR, USA, Africa, Review.

Flue gas suppression and environmental evaluation of deodorizer-modified rubber asphalt based on radar method

Rubber-modified asphalt (RMA) is associated with impaired storage stability and additional harmful emissions during application. Microwave-oil bath activation of waste rubber powder (WRP) to improve its compatibility with asphalt. The treatment of VOCs and malodorous gas emissions from RMA is carried out using powder deodorizers, liquid deodorizers and their combination. The storage stability, high and low temp rheological behavior of RMA were investigated. The effects and machinations of three deodorants on odor removal and VOCs inhibition of RMA were explored. The emission indexes based on the characteristic pollutants of VOCs and malodorous gases were proposed to conduct a comprehensive environmental impact assessment by the Radar method. The results show that the activated WRP has a fluffier morphology and is better encapsulated by the oil film, which enhances the storage stability of RMA. The incorporation of deodorant has not altered the viscoelastic properties of asphalt. The higher specific surfaced areas and extensive pore structures was contributed to the adsorption of VOCs molecules from asphalt. VOCs and odor gases from asphalt could be inhibited by liquid deodorizers based on Lewis acid-base reactions, addition reactions, catalytic reactions, and redox reactions. LMA was the most effective in decreasing odorant gases, with reductions of up to 92.6% and 90.8% for isobutanol and dimethyl disulfide, respectively. PMA had the optimal inhibitory activity for vinyl chloride, which was 67.7%. The decrease of total concentration of VOCs in RMA by PMA (powder deodorant-modified asphalt), LMA (liquid deodorant-modified asphalt), and CMA (complex deodorant-modified asphalt) could be calculated as 51.7%, 34.1% and 46.7% respectively. RMA had a high load on the environment, and the overall advantage of CMA was greater. The environmental impacts of the four modified asphalts were ranked as CMA < PMA < LMA < RMA. Therefore, the utilization of powder and liquid compounding was recommended to improve the environmental impact of RMA.

Sustainable railways for Morocco: a comprehensive energy and environmental assessment

This study provides a comprehensive environmental impact assessment of different train types in Morocco, including passenger-only, goods-only, and mixed-use services. Through a comparative evaluation based on climate change, respiratory effects, and acidification/eutrophication, we find that passenger-only trains exhibit the highest environmental impact across all categories due to their high energy consumption and emissions. Conversely, goods-only and mixed-use trains display markedly lower environmental impacts, emphasizing the role of service type and operational efficiency in mitigating environmental harm. Our findings underscore the need for strategic optimization in train services, particularly passenger-only operations, and open the door for comprehensive economic and environmental assessments of alternative train technologies and fuel mixtures in the context of Morocco’s decarbonization plans.

The Environmental Impact of Radiation Oncology: The "Footprint" of External Beam Radiation Therapy

There is a growing concern for the healthcare sector's impact on the environment. Prior carbon impact studies in radiation oncology have been limited in scope and methodology. This study aims to fill this gap by using an internationally recognized cradle-to-grave life cycle assessment (LCA) approach to quantify all environmental impacts from raw material extraction to product disposal for external beam radiation therapy (EBRT) in treating the most commonly diagnosed cancers. This LCA was performed in accordance with ISO 14040 and 14044 at a single academic medical center. It quantified the environmental impact of EBRT across four categories: global warming potential (GWP), carcinogenic and non-carcinogenic human toxicity, and respiratory effects (PM2.5), from initial consultation to the completion of the last EBRT fraction for each disease site. Data collection involved weighing all materials used, measuring/calculating building and equipment electricity usage (e.g., HVAC and Linacs), and recording patient and staff transit. The study analyzed the impact of both minimum and maximum fractionations for each disease site and simulated alternative clinical scenarios such as telemedicine, renewable energy use and hypofractionation. Regardless of disease site, there were significant differences in the environmental impacts associated with transit, electricity and supplies for EBRT treatment cycles. Staff and patient transport contributed the most, accounting for >92% of the total environmental impact including GWP (5.02x102 ± 9.38x101 kgCO2eq), carcinogenic (6.25x10-5 ± 1.23x10-5 CTUh) and non-carcinogenic human toxicity (1.16x10-4 ± 2.35x10-5 CTUh). Electricity accounted for 1-13% of the total impact, with most impact arising from respiratory effects (3.05x10-2 kg ± 2.72x10-3 PM2.5). The impact of supplies and materials was less than 3% across all categories. Alternative scenario modeling showed that telemedicine had a maximum impact reduction of 3.5% (2.54x 101kgCO2eq) for GWP, while renewable energy use had a maximum impact reduction of 8% (2.37 x 10-2 PM2.5) for respiratory effects. Reducing the number of total treatment days via hypofractionation can reduce GWP by 67-78% and carcinogenic emissions by 63-77% (3.48 x 102 - 5.53 x 102 kgCO2eq) and (3.73 x 10-5 - 6.85 x 10-5CTUh), respectively, with variation depending on the total number of fractions. This study provides a comprehensive environmental impact assessment for EBRT among the most commonly treated disease sites, establishing a baseline metric and identifying targets for impact reduction. We are currently performing a multi-center validation study to be completed by June 2023. Our findings fill an important gap in cancer care and are critical for developing sustainable practices in the face of increasing demand for radiotherapy in a changing climate. LCAs evaluating all aspects of cancer care will be essential for promoting equitable and sustainable care.

A Parametric BIM Framework to Conceptual Structural Design for Assessing the Embodied Environmental Impact

Decisions made in the early design stage have a significant effect on a building’s performance and environmental impact. In practice, a conceptual design is performed by an architect, while a structural engineer begins to work in later phases when the architectural concept has already evolved. However, the geometry and form of a building directly determine the type of structure and applicable materials; therefore, the conceptual design phase gives rise to examining alternative solutions. This paper presents a method for generating alternative structural solutions in the conceptual design phase and examining their embodied environmental impact by integrating parametric design and building information modeling (BIM). Rhinoceros and Grasshopper were used to develop the parametric script, which includes the generation of geometrical variations, the automatic definition of initial cross sections for the load-bearing elements based on in-built structural design approximations, the datasets for embodied environmental impact of the used building materials, the generation of life cycle inventory (LCI), the automatic calculation of life cycle assessment (LCA) results based on the geometry, and the conversion of the parametric model into building information model. The method was demonstrated using a case study of 48 different alternative solutions for an unheated warehouse made of steel frames. Based on the results, the areas with the greatest energy impact were identified. The case study analysis also illustrated that the applied cross section may have a significant effect on the impact categories. The results draw attention to the complexity of LCA calculations even in the case of a simple structure containing a limited number of variables, where parametric design can serve as an effective tool for a comprehensive environmental impact assessment.

A scenario-based food security analysis and halophyte crop suitability assessment in dying lake environments impacted by climate change

Climate change has significantly impacted food shortages over the past decades, and predicted projections have also indicated potentially intensive consequences for species diversity and natural environments in the coming decades. Climate change in the form of drought has resulted in environmental impacts on global dying lakes (GDLs), such as water scarcity, land degradation and food shortage. Thus, new comprehensive environmental impact assessment methods are urgently needed for GDLs to inform decision-making and minimise the negative impacts on the environment and human life and wellbeing. As state of art and progressive research, the main objective of this research is to develop an approach using a comprehensive and transferable geographic information science scenario-based suitability assessment to analyse the capability of halophyte plants as alternatives for crop modification in GDL areas. The approach was developed and examined for Salicornia suitability mapping in the Lake Urmia Basin as one of the most critical GDL cases. To obtain the ecological requirement information, we performed a scenario-based cultivation experiment on Salicornia under different salinity conditions. Accordingly, we employed relevant ecological requirements and environmental indictors for the Salicornia plant (e.g. soil characteristics and climate) to identify suitable areas for cultivating this plant under scenario-based spatial modelling and performed an uncertainty analysis. The results were achieved and validated in a field operation and laboratory analysis. According to the results, the Salicornia plant can be efficiently considered an alternative crop in farmlands around Lake Urmia that are impacted by intensive soil, aquifer salinisation and food production issues. Results pointed out that about 4.6% of the area (2372 km2) is highly suitable for the cultivation of Salicornia. As state of the art, our approach was developed in a semi-automated context but can also be customised and applied to similar case studies in GDL environments. We expect that the information and insights gained from such assessments will support stakeholders, decision makers and authorities in the development of effective policies and plans for mitigating the impacts of climate change on the fragile ecosystems of GDLs.

Comprehensive environmental impact assessment of plastic film mulching with emphasis on waste disposal of discarded plastic film in sunflower production

Large proportions of plastic film residues are not recycled after their service life, posing a serious threat to the environment. Understanding and optimizing the disposal of discarded plastic film can be crucial to limit damage to the environment. In this study, we determined the potential environmental impact of different cultivation methods in terms of four endpoint damage categories, namely climate change, human health, ecosystems, and resource depletion, with specific emphasis on the disposal process of discarded plastic films. Plastic film mulching considerably increased damage per hectare in all endpoint categories. However, in three endpoint categories, damage per kilogram of yield produced was lower under plastic film mulching. Chemical fertilizer input was the most dominant contributor to environmental damage, accounting for approximately 60% of the total environmental impact. Recycling was the most beneficial strategy for offsetting and mitigating all endpoint damage categories compared with incineration and landfill. This positive environmental benefit of recycling can primarily be attributed to the fact that recycling discarded plastic film can reduce white waste and allow recycled plastic film to be reused as part of a new product.

Life-cycle assessment of current and future electricity supply addressing average and marginal hourly demand: An application to Italy

The increase in overall electricity demand in recent years, together with the rapid and significant changes in electricity generation has motivated increased research addressing environmental impacts of current and future electricity generation and supply systems. This article presents a comprehensive life-cycle assessment (LCA) of electricity generation and supply for the Italian current mix and future scenarios, for a wide set of environmental impacts and indicators, addressing intra-year variations, and including average and marginal demand impact perspectives. The generation mix was modelled for a 3-year period (2018–2020) with hourly and country-specific data, for the main generation technologies; and two future scenarios (for 2030) were modelled applying the EPLANopt energy system model. While future scenarios - with larger renewable energy shares - resulted in reduced environmental impacts in most categories, they were associated with burden shifts. In particular, increased shares of solar photovoltaic generation in future scenarios resulted in significant contributions to mineral and metal resource depletion and to land use impacts. The high penetration of renewable energy sources in future scenarios was also associated with important seasonal and hourly variations, demonstrating the importance of addressing intra-year temporal variations. Moreover, complementing an average with a marginal demand perspective provided insight on potential impacts of demand changes. When considering a marginal demand perspective, future scenarios offered no clear benefits in terms of global warming, for example. The research demonstrated the need for comprehensive and detailed environmental impact assessments with fine time resolution, which can assess seasonal and intra-daily variations, and the evaluation of environmental impacts with both average and marginal demand perspectives highlighted the complementary nature of the two in providing insightful results. The approach is fully replicable to other countries and regions - it can improve LCAs of electricity generation and supply and provide robust results to adequately inform decision-making on electricity generation and demand management, toward more sustainable energy systems.

Regional comprehensive environmental impact assessment of renewable energy system in California

Fossil-fuel-based energy systems pose a significant threat to the climate and ecosystem. Renewable energy is considered key to achieving carbon neutrality and the Sustainable Development Goals. California is a forerunner in promoting renewable energy and sustainable development. However, regionalized renewable energy systems are accompanied by intensive material inputs and outputs, which undoubtedly have associated environmental impacts while mitigating climate change. It is necessary to measure the spatio-temporal distribution and the comprehensiveness of these impacts in order to plan renewable energy systems rationally. In this study, a life cycle assessment (LCA) on the renewable energy system of California between 2001 and 2019 was conducted to estimate the resulting diverse environmental impacts. The results show that solar energy and biomass and waste-to-energy are the main contributors to the comprehensive life-cycle impacts of the renewable energy system in California from 2001 to 2019, accounting for 62.7% ± 1.2% and 35.1% ± 1.2%, respectively. The most prominent source of environmental impact is AP, instead of the most attention-getting category, global warming potential (GWP). Geographically, Kern currently holds the highest generation of renewable energy (15.3 TWh in 2019) in the state. The corresponding normalized and weighted environmental impact is also most notable in Kern, reaching 1.7E-02 in 2019, twice as much as in Imperial, the second largest energy producing county. From 2001 to 2019, the per kWh weighted environmental impact of California's renewable energy system decreased, but the total effects increased sixfold with the promotion of renewable energy. Overall, renewable energy systems can reduce environmental impacts compared to conventional energy sources. It can help achieve some ambitious environmental goals. However, the results of this study remind us that in the renewable energy sector, we should not only focus on greenhouse gas emissions, but in the context of social development, this case shows that acidification potential (AP), ozone depletion potential (ODP) and photochemical oxidant formation potential (POFP) need to be managed more than GWP. Given the uneven distribution of natural resources, there is still room to improve further the environmentally friendly efficiency of California's renewable energy system, which will require technological advances and improved deployment of resource management.

The significance of resource recycling for coking wastewater treatment: based on environmental and economic life cycle assessment

The sustainability of the coking industry is supported by reasonable production profit and environmental quality requirements. The traditional measures substantially increased the related costs for enterprises to reach standards. This paper aims to develop a comprehensive cost combined environmental impact assessment method that is necessary for the analysis of wastewater treatment systems. Typical three coking wastewater treatment processes in China were evaluated. Results showed that eutrophication dominantly contributed to the overall environmental effect. Improving effluent quality could significantly reduce the total environmental impact. In terms of an economic perspective, the price of raw materials was the main factor that affected the operating cost of comprehensive treatment. Based on subsystem analysis, the pretreatment stage accounted for the majority of environmental and cost burdens, respectively reaching 64%–78% and 64%–86%. Optimizing the pretreatment process by enhancing the efficiency of high concentration raw material recovery and substituting toxic raw materials for extractant could reduce the environmental impact and economic cost by 43.8% and 57%, respectively, which was an effective way to improve the potential performance of coking wastewater treatment plants (WWTPs).

Do the Environmental Approval Conditions Enable the Best Practice EIA Follow-up and Hence Strengthen the EIA System? An Indian Case Study Analysis

The environmental approval for a project is generally granted with a set of terms and conditions to the project proponent. The environmental clearance (EC) letters for 33 infrastructure projects were examined for the relevance, adequacy, and enforceability of the EC conditions. Using the basic tenets of the EIA process, it is found that the long list of irrelevant, inadequate, and unenforceable conditions is greenwash and unsuited for best practice EIA follow-up, hence meeting the EIA objectives. The conditions should be directed at measuring the environmental performance of the project to catalyze achieving sustainability targets. The conditions for stringent supervision and frequent inspection of the site activities in the construction phase could help ensure the implementation of the proposed mitigation measures for infrastructure projects. A comprehensive environmental impact assessment framework may use the principles of the ABC analysis to prioritize the properly specified EC conditions, resource allocation, and stakeholder engagement for the best practice EIA follow-up and hence strengthen the EIA system.

Re-use of built environment - Strategic planning of sampling locations for the environmental impact assessment of former airports: The use-case of the former Hellenikon airport in Athens, Greece

The interaction between the built environment and its surrounding ecosystem needs to be taken into account when reuse activities are planned. The bilateral influence of building assets on their surroundings creates a continuity of impacts that exists even when the building stock is replaced; the surrounding environment projects part of the prior impact to the new constructions. A special case of built environment reuse regards the redevelopment of former airports. Such major redevelopment projects require comprehensive environmental impact assessment studies, which necessitate significant resources for the collection of the required documentation and measured data. This work regards a methodology of strategic planning of sampling locations for the assessment of the environmental impact and pollution levels at former airports. It is developed and applied in the use-case of the former Hellenikon airport in Athens, but it can be used to other large-area redevelopment cases.