Net Emission Reduction Research Articles

Innovative solutions for coastal wetlands pollution: Application of Spartina alterniflora Loisel. - biochar for cadmium removal and carbon sequestration

Coastal wetland ecosystems are extremely fragile, with heavy metal contamination and uncontrolled growth of invasive plants (e.g. Spartina alterniflora Loisel.) could result in threaten the ecological security and resource wastage. In this study, Spartina alterniflora-biochars at two different temperatures (400 and 600 °C), as well as phosphorus-modified biochars (400BC, 600BC, 400PBC, and 600PBC) were produced, and evaluated for their removal capacity in cadmium (Cd)-contaminated sediments. The maximum sorption capacity, as determined by the Langmuir equation, was in the order of 600BC (838.81 mg/g) > 400BC (707.25 mg/g) > 600PBC (581.69 mg/g) > 400PBC (455.82 mg/g) for Cd, with adsorption occurred through single-layer chemical processes. In the Cd removal tests, increasing incubation times led to a significant reduction in bioavailable Cd (from 84.74 mg/kg at 1 h to 34.79 mg/kg at 7 day). There were significantly negative correlation (p < 0.01) and highly linear regression correlation (R2 > 0.81) between bioavailable Cd and three enzymes’ activities (urease, sucrase, and acid phosphatase). Moreover, 63.52%–98.75% of the desorbed Cd can be reabsorbed and fixed in the presence of biochar after 56 d, which effectively reducing the potential for secondary release of heavy metals into the environment. Notably, a comprehensive evaluation through cost-benefit analysis (CBA) and life cycle assessment (LCA) revealed that the biochar system can generate an overall profit of $302.8/tonne and result in a net reduction of CO2 emissions by 1455.479 kg/tonne. The application of biochar could reduce carbon footprints and promote carbon neutrality, and be an effective in-situ remediation strategy for Cd-contaminated coastal wetland.

The production of biogenic carbon and green hydrogen through biomethane pyrolysis: the environmental benefits for the metallurgy sector

Abstract The iron and steel industry is responsible for around 4% of androgenic CO2 emissions in Europe and 9% worldwide. This is due to the massive use of carbon coke in metallurgy, which is not only linked to energy purposes, but also to the chemical process of iron ore refining. The steel sector urgently needs to find alternative solutions to improve environmental sustainability, with the transition to a low-carbon scenario representing a major challenge. The pyrolysis of methane is gaining more and more attention for the production of hydrogen, as this alternative process to hydrogen production does not generate any CO2 emissions, but provides a solid carbon product that can be re-used in an industrial symbiosis. If biomethane is used, the pathway is even carbon-negative, and generates a net GHG reduction compliant with the EU ETS (Emission Trading Scheme). However, given the high demand for inlet streams in the EU steel sector, the biomethane currently available is not able to meet the entire hydrogen demand assuming that the steel is produced using the DRI-EAF (Direct Reduction Iron-Electric Arc Furnace) route. Only when looking at the European projections for biomethane production in 2050, it is expected that the demand for steel hydrogen can be totally met, in particular by using 48% of the available biomethane, allowing up to 6 million tons of green hydrogen to be produced, and a significant reduction in net CO2 emissions. Finally, the aim of this work is to assess the energy consumption and environmental benefits resulting from the production of green hydrogen and biogenic carbon in Europe for DRI-EAF, compared to the benchmark market (DRI-EAF fed with natural gas) and the electrolysis alternative.

Comprehensive evaluation of CCUS technology: A case study of China's first million-tonne CCUS-EOR project

CCUS, an emerging technology for reducing carbon emission, plays a crucial role in achieving the goal of carbon neutrality. CCUS technology exemplified by CO2 enhanced oil recovery (EOR) is gradually progressing from project demonstration to large-scale application. However, the commercial application still faces uncertainties in economic cost, energy efficiency and environmental benefits. This paper takes China's first million-tonne CCUS-EOR project (Qilu Petrochemical-Shengli Oilfield CCUS-EOR project) as an example, and establishes a comprehensive research framework for evaluating CCUS from the three dimensions of energy, environment, and economy, based on economic viability, energy input-output analysis, and carbon input-output analysis. The results demonstrate that during the project lifecycle, when the average oil price is $90/bbl, the project's NPV is $56.09 million, the project's IRR is 13.4 %, the payback period is 8.34 years, and the threshold oil price for the project to be economically profitable is $81.52/bbl. Furthermore, the Energy Return on Investment (EROI) of the project is 9.09, which considerably superior to that of the Shengli Oilfield's non-EOR, and the net energy output is approximately 18,472.57 kilobarrels. The Carbon Return on Investment (CROI) of the project is 4.12, with significant environmental benefits, and the cumulative net carbon emission reduction is approximately 8078.55 kilotonnes. Furthermore, the trends in EROI and CROI of the CCUS-EOR project demonstrate nearly opposite trajectories. The variation trends in EROI emerge N-shaped curve, while that of CROI emerge S-shaped curve. In summary, the Qilu Petrochemical-Shengli Oilfield CCUS-EOR project exhibits notable advantages in terms of energy efficiency and environmental benefits. However, the threshold oil price for triggering economic profitability is relatively high, which may pose certain economic risks to investors during periods of low oil price.

Enhancing Agricultural Soil Carbon Sequestration: A Review with Some Research Needs

The US rejoined the Paris Agreement in 2021 with a targeted 50–52% reduction in net GHG emissions in 2030 relative to 2005. Within the US’s nationally determined contributions, several land-based mitigation options were submitted, targeting the removal of 0.4–1.3 GtCO2 yr−1 in 2030 compared to the net flux in 2010. Acknowledging disagreement has existed on both technological and economic feasibility levels of soil C sequestration adoption and practices, this review explores and evaluates the research findings and needs for six concepts: (1) permanence; (2) additionality; (3) leakage; (4) uncertainty; (5) transaction costs; and (6) heat-trapping ability of different gases. These concepts are crucial for the effective implementation of soil C sequestration projects since they help establish robust and integrated methodologies for measurement, verification, and issuance of carbon credits. In turn, they help ensure that environmental, social, and economic benefits are accurately assessed and credibly reported, enhancing the integrity of carbon markets and contributing to global climate mitigation efforts. This review also evaluates the existing and potential market opportunities for agricultural production with C sequestration and “climate- smart” farming practices. Current barriers to, research needs for, and policy considerations regarding soil C sequestration strategies are also stated.

Evaluating the near- and long-term role of carbon dioxide removal in meeting global climate objectives

The 6th Assessment Report from the Intergovernmental Panel on Climate Change lacked sufficient land-sector scenario information to estimate total carbon dioxide removal deployment. Here, using a dataset of land-based carbon dioxide removal based on the scenarios assessed by the Intergovernmental Panel on Climate Change, we show that removals via afforestation and reforestation play a critical near-term role in mitigation, accounting for around 10% (median) of the net greenhouse gas emission reductions between 2020 and 2030 in scenarios that limit warming to 1.5 °C with limited overshoot. Novel carbon dioxide removal technologies such as direct air carbon capture and storage scale to multi-gigatonne levels by 2050 and beyond to balance residual emissions and draw down warming. We show that reducing fossil fuel and deforestation emissions (gross emissions) accounts for over 80% of net greenhouse gas reductions until global net zero carbon dioxide (CO2) independent of climate objective stringency. We explore the regional distributions of gross emissions and total carbon dioxide removal in cost-effective mitigation pathways and highlight the importance of incorporating fairness and broader sustainability considerations in future assessments of mitigation pathways with carbon dioxide removal.

Europejski Zielony Ład, czyli jak Unia Europejska zamierza uczynić z Europy pierwszy neutralny kontynent dla klimatu?

THE EUROPEAN GREEN DEAL, OR HOW DOES THE EUROPEAN UNION INTEND TO MAKE EUROPE THE FIRST CLIMATE-NEUTRAL CONTINENT? The research aim of the paper is to analyze the objectives of the European Union (EU) climate policy and the instruments for their implementation, as well as to present the challenges on the way to achieving climate neutrality by the EU. In 2015, during the 21st UN Climate Change Conference in Paris, an agreement was agreed, the purpose of which is to limit global warming, aiming, among other things, for limiting the increase in global average temperature to well below 2°C above pre-industrial levels, and preferably to no more than 1.5°C. All EU Member States have ratified the above agreement, while agreeing to take action to make the EU the world’s first climate-neutral economy and society by 2050. To achieve this, the “European Green Deal” strategy was adopted, followed by the European Climate Law and the “Fit for 55” package of legislative proposals. In addition, a more ambitious EU climate target for 2030 has been agreed, namely a reduction of net greenhouse gas emissions by at least 55% compared to 1990 levels. Based on this, the following research hypothesis should be put forward, assuming that if all initiated projects, climate programs and mechanisms are fully implemented, the EU will become the first climate neutral continent by 2050. The first part of the article focuses on the goals of the European Green Deal and their implementation. The second part discusses the assumptions of European Climate Law and the elements of the “Fit for 55” package, as well as presents the most important financial instruments of the EU climate policy. The third part contains an analysis of the challenges standing in the way of the EU achieving climate neutrality by 2050, including the COVID-19 pandemic and the Russian aggression against Ukraine.

Integrated CO2 capture and conversion into methanol units: Assessing techno-economic and environmental aspects compared to CO2 into SNG alternative

Using carbon dioxide (CO2) as a raw-material to produce value-added chemicals has a strategic role to play in the decarbonization of energy resources and the transition to a climate-neutral economy. E-methanol, Synthetic Natural Gas (SNG) and e-kerosene are one of the most promising pathways to convert CO2. In this context, the aim of this work is to propose an optimized and integrated CO2 to methanol process and then to compare it to the CO2 to SNG process from economic and environmental points of views. An optimized reactor configuration in the CO2 to methanol conversion unit has been successfully implemented in Aspen Plus® and leads to a thermal energy self-sufficiency of this unit. A heat integration with an advanced capture unit has been performed where 5 % of the heat requirement could be provided from the conversion unit while 95 % come from external steam source. Techno-economic assessment of the optimized process showed that methanol is more profitable when it is used as a raw material to synthetize other chemicals. As an energy carrier, SNG is more interesting. Compared to the reference scenario, a net CO2 emission reduction of 70 % in the CO2 to SNG route and of 60 % in the CO2 to methanol route were obtained. Concerning the fossil depletion impact, in both cases, a reduction of more than 60 % was noticed (ca. 75 % in CO2 to SNG route and 61 % in CO2 to methanol case).

Estimating the emissions reductions from supply-side fossil fuel interventions

Supply-side interventions that retire highly emitting fossil fuel assets have received increased attention from policymakers and private actors alike. Yet concerns about market leakage—wherein reduced supply from one source is partially offset by increased production from other sources—have raised questions about how much emissions reductions they can achieve. In this paper, we estimate the effects of these supply-side interventions on global emissions, accounting for both market leakage as well as the relative greenhouse gas (GHG) intensity of different sources of supply. We account for uncertainty in market leakage rates and the emissions intensities of the curtailed and substitute sources of supply through a Monte Carlo analysis, drawing on supply and demand elasticities from the economics literature and emissions intensity data from the state-of-the-art Oil Climate Index plus Gas (OCI+) dataset on 586 oil and gas fields around the world. We find a rough band of central estimates for life-cycle emissions reductions from permanent and additional supply-side interventions in the range of 40–50% of the gross life-cycle emissions of each barrel curtailed, depending on the relative emissions intensity of the curtailed and substitute sources of supply. Further, across all of 1.53 million Monte Carlo simulations we conduct, we find very high confidence of net emissions reductions from supply-side interventions (nearly 99% of cases). Finally, targeting the most emissions-intensive sources of oil supply could achieve yet further emissions reductions. How one compares methane and CO2 emissions also has important consequences for which sources to target. Importantly, all estimated emissions reductions we estimate hinge upon a given supply-side intervention being credibly permanent and additional, and our estimates do not assess the uncertainties of those criteria being met due to the idiosyncratic nature of those assessments.

Management of excavated soil and dredging spoil waste from construction and demolition within the EU: Practices, impacts and perspectives

Excavated soil and rock (ESR) and dredging spoils (DDS) account for 23 % of the total EU waste generation in 2020. This study performs a life cycle assessment and life cycle costing to quantify the potential environmental and cost savings resulting from increasing the level of ESR and DDS prepared for reuse and recycled in comparison to the business-as-usual practice. Scenarios for the waste management pathways based on the status quo, technical feasibility or normative impositions are assessed, including the potential contribution to achieving the European Green Deal goals. Results show that promoting preparing for reuse and recycling could lead to non-negligible GHG reductions (up to 3.6 Mt. CO2 eq.) and economic savings (EUR 12.3 billion) annually. Depending upon the scenario, 0.2 % to 1 % of the net annual GHG emissions reductions sought by the European Green Deal could be facilitated by scaling up improved circular management of ESR and DDS at the EU level. Finally, the study highlights the main barriers to scaling up to more circular (i.e., preparing for reuse and recycling) and better performing management options in Europe. The results provide new insights for the European Green Deal and circular economy policymaking for CDW.

Energy Transition, fossil Fuels, and green Innovations: Paving the way to achieving sustainable development Goals in the United States

The United States, as the world's second-largest polluter, emitted a staggering 4.7 billion metric tonnes of carbon dioxide in 2020. During the Leaders’ Climate Summit, the US president articulated precise targets for combating climate change, notably a 50 to 52 percent reduction in net CO2 emissions from 2005 levels by 2030. Consequently, it becomes imperative to identify the pivotal factors that are driving this intensified dedication to achieving the Sustainable Development Goals (SDGs). Hence, it is vibrant to determine the basic causes propelling the intensified interest in meeting SDGs 7 and 13. From this perspective, this study explores the dynamic link between energy transition, fossil fuel energy, green innovation, and economic complexity index on CO2 emissions and ecological footprint in the United States from 1980 to 2020. The dynamic Autoregressive-Distributed Lag (ARDL) simulations and Frequency Domain Causality (FDC) techniques are applied for long-medium and short-run causal association among the variables. Our empirical evidence shows that energy transition, fossil fuel energy, and economic complexity increase CO2 emissions and ecological footprint. On the other hand, green innovation reduces CO2 emissions and ecological impact only in the long term. The pragmatic outcomes suggest that authorities should inhibit Fossil Fuel Energy, concentrate on energy transitions, and include more renewable sources in the US energy mix. The findings would assist the United States in meeting SDGs 7 and 13.

The Current Status and Future Prospects of Carbon Capture, Carbon Transportation, And Carbon Utilization Technologies in Chinese Coal-Fired Power Plants Within the Context of Dual Carbon Goals

Carbon dioxide capture, utilization, and storage (CCUS) constitute vital measures for achieving net emissions reduction in China. Against the backdrop of the “dual carbon” initiative in China, this paper meticulously examines and analyzes the key technological principles, merits and demerits, and bottlenecks associated with CCUS carbon capture in the country’s thermal power plants at the current stage. It combines the prevailing industrial application status and the future development trajectory of pertinent technologies with considerations of industrial economic benefits and business models. Building upon this analysis, the paper summarizes the application status of CCUS technology in China’s thermal power plant industry and presents future prospects. On the technological front, the three capture methods grapple with the challenge of high costs. Therefore, there is a need to intensify efforts in developing low-cost and efficient carbon capture materials, as well as researching and practically applying low-cost oxygen generation technology. Economically, CCUS technology currently faces high costs, low returns, and certain commercial barriers, placing China in a demonstrative business model stage. To overcome these challenges and realize the economic benefits of CCUS technology, government incentives and technological innovation are imperative. These measures aim to reduce the overall cost of CCUS technology, stimulate the scale development, and foster commercialization, ultimately contributing to the achievement of China’s carbon emission reduction targets.

Changes in soil N2O emissions and nitrogen use efficiency following long-term soil carbon storage: Evidence from a mesocosm experiment

Policy and market incentives are rapidly expanding to promote soil organic carbon (SOC) sequestration in global croplands. Evidence suggests that long-term increases in SOC can influence both crop yield and nitrogen (N) fertilizer requirements, with the potential to help address two important sustainability challenges. However, increases in SOC may also trigger higher soil nitrous oxide (N2O) emissions, which would represent an important tradeoff for climate change mitigation. We tested the hypothesis that long-term increases in SOC are associated with higher crop yields and fertilizer N use efficiency (NUE), but at the cost of higher N2O emissions. Wheat was grown in two soils (SOClow and SOChigh) under three N fertilizer rates (0, 100, and 200 kg N ha−1) in a mesocosm experiment. Soils were obtained (0–25 cm) from a 22-yr field experiment on no-till and cover cropping in California. Results indicate that total biomass and grain yield were higher for SOClow than SOChigh at 100 kg N ha−1 but not the other N levels. Crop N uptake was also 28% greater for SOClow at 200 kg N ha−1, resulting in higher overall NUE. Soil N2O emissions increased for SOChigh by 25–112% compared to SOClow, likely due to long-term changes in labile C and N pools, microbial activity, and soil structure influencing porosity and gas diffusion. While there are well-documented crop and environmental benefits from enhancing SOC in agricultural soils, results from this study suggest that changes in soil N2O emissions should be considered to accurately determine net GHG emission reductions.

Sustainable energy transition in Bangladeshi academic buildings: A techno-economic analysis of photovoltaic-based net zero energy systems

Bangladesh faces challenges with global carbon emissions and energy security due to its heavy reliance on imported fossil fuels. This paper investigates the techno-economic viability of photovoltaic (PV) systems for achieving net-zero energy in academic buildings as a sustainable alternative. The study evaluates the performance of PV systems based on factors including annual energy production, capacity factor, net-zero energy potential, self-consumption/sufficiency ratio, renewable fraction, levelized cost of energy (LCOE), net present value (NPV), payback period, profitability index (PI), and carbon emission reduction. The results indicate that optimally sized PV systems can generate net positive energy: 6.18 MWh for universities, 4.04 MWh for high schools, and 3.62 MWh for primary schools. Economic viability was assessed under two billing methods (net metering and all energy buy/sell), and all cases showed positive NPV and PI values greater than 1. Decarbonization analysis revealed significant reductions in CO2 emissions: 2026.5 tons for universities, 18.9 tons for high schools, and 9.7 tons for primary schools. Finally, a sensitivity analysis assessed the optimal PV system size for seven other regions in Bangladesh. These findings suggest that the widespread adoption of PV systems in academic buildings can play a crucial role in achieving net-zero energy, contributing significantly to the government and policymakers' pursuit of sustainable development goals.

Planned expansion of transportation infrastructure in Brazil has implications for the pattern of agricultural production and carbon emissions

High transportation costs have been a barrier to the expansion of agriculture in the interior of Brazil. To reduce transportation costs, Brazil launched the National Logistics Plan, aiming to expand its railway network by up to 91 % by 2035. Such a large-scale infrastructure investment raises concerns about its economic and environmental consequences. By combining geospatial estimation of transportation cost with a grid-resolving, multi-scale economic model that bridges fine-scale crop production with its trade and demand from national and global perspectives, we explore impacts of transportation infrastructure expansion on agricultural production, land use changes, and carbon emissions both locally and nationally in Brazil. We find that globally, the impacts on output and land use changes are small. However, within Brazil, the plan's primary impacts are impressive. PNL2035 results in the reduction of transportation costs by 8–23 % across states (depending on expansion's extent) in the interior Cerrado biome. This results in cropland expansion and increases in terrestrial carbon emissions in the Cerrado region. However, the increase in terrestrial carbon emissions in the Cerrado is offset by spillover effects elsewhere in Brazil, as crop production shifts away from the Southeast-South regions and accompanying change in the mix of transportation mode for farm products from roadway to more emission-efficient railway. Furthermore, we argue that the transportation infrastructure's impact on the enhanced mobility of labor and other agricultural inputs would further accentuate the regional shift in agricultural production and contribute to carbon emission mitigation. Upon its completion, PNL2035 is expected to result in the reduction of net national emissions by 1.8–30.7 million metric ton of CO2-equivalent, depending on the impacts on labor and purchased input mobility. We conclude that the omission of spillover effects due to infrastructure expansion can lead to misleading assessments of transport policies.

Assessment of Implementing Green Logistics Principles in Railway Transport: The Case of Lithuania

Today, green transport is a growing trend in terms of transport costs, CO2 emissions and satisfaction with logistics services. Green logistics is an environmentally friendly and sustainable logistics system that encompasses activities affecting logistics functions and processes, promoting the environment and the development of a circular economy. Rail transport is considered to be one of the least polluting modes of transport, but the fact that only electrified rail represents the concept of green logistics has been underemphasised, as the fleet consisting of diesel trains is a major challenge. This article aims to investigate the implementation of green logistics in railway transport in the case of Lithuania. The scientific literature, SWOT analysis, expert evaluation and parameter correlation methods were used to achieve this goal. An analysis of the internal and external factors of Lithuanian Railways in terms of green logistics has identified the main strengths of rail transport. These are environmental friendliness, electric trains reducing CO2 emissions, a strong focus on circular economy and others. The main weaknesses include the more extensive use of diesel trains, competition, etc. The external factors of the company show that the main opportunities are the reduction in net CO2 emissions to zero, the acquisition of more electric locomotives and others, while the main threats include an increase in energy costs or the complexity of implementing new technologies. An analysis of these factors has led to the construction of a SWOT matrix, which shows that the company’s strategy in the field of green logistics is quite strong, with more strengths than weaknesses. The results made it possible to identify the links between the individual implementation principles of green logistics in railway transport and provide strategic guidelines for the successful integration of green logistic principles into railway transport in Lithuania.

Peatland restoration in Germany: A dynamic general equilibrium analysis

Drained peatland currently contributes 7.5% of Germany's total national greenhouse gas emissions. The National Peatland Protection Strategy adopted by the German government in 2022 recognizes that these emissions need to be reduced significantly to meet the country's climate change mitigation commitments. The present study employs a global dynamic computable general equilibrium model to assess the economic and greenhouse gas emission impacts of alternative agriculture-focused peatland rewetting scenarios for Germany up to 2030. In contrast to partial-analytic approaches, the global general equilibrium approach allows to take consistent account of economic ripple-on effects and carbon leakage effects triggered by peatland rewetting. The results suggest that in the medium term towards 2030 a reduction in annual emissions from agricultural peatland use by up to 45% are attainable at marginal private abatement costs between 27 and 61 Euro/tCO2e. Carbon leakage effects due to induced indirect land use change in Germany and the rest of the European Union reduce the global net emission reduction impact by 0.7 to 1.0% of the direct emission reduction. The effects on food prices remain small in all scenarios. In conclusion, a sizable reduction of Germany's land-use-related emissions is achievable at a low macroeconomic cost by moving beyond the moderate ambitions of the National Peatland Restoration Strategy.

Upward convergence patterns in chosen environmental-related SDGs

Sustainable development is a challenge facing humanity. EU countries not only strive to reach their specific objectives, but they also work collaboratively towards shared goals. There is a need to balance synergies and compromises to address these objectives effectively. When discussing countries' development and people's well-being, one often focuses on socio-economic development. However, it is crucial not to overlook the environmental repercussions and the need to care for the planet. Thus, our article pays attention to the sustainable development objectives of the “planets” group.We analysed upward convergence in the scope of the “Planet” goals, i.e. the analysis of improving the results of Member States and, at the same time, reducing the differences between them. Convergence trends were examined individually for each variable and then for all variables combined (Planet). Our article fills a research gap because, to our knowledge, analyses of the trajectories of achieving individual goals in such a context have not been analysed so far. The results of our study indicate a favourable situation in the case of six out of eight examined variables. Areas in which intensification of activities is necessary for some EU countries are an increase in energy productivity and a reduction in net greenhouse gas emissions of land use. The second stage of the study concerned the development paths of individual countries. The most challenging situation concerns the variable sdg_07_20 (final energy consumption in households per capita). In this case, as many as 12 countries belong to the weak group.

Predicting the spatial variation in cost-efficiency for agricultural greenhouse gas mitigation programs in the U.S.

BackgroundTwo major factors that determine the efficiency of programs designed to mitigate greenhouse gases by encouraging voluntary changes in U.S. agricultural land management are the effect of land use changes on producers’ profitability and the net sequestration those changes create. In this work, we investigate how the interaction of these factors produces spatial heterogeneity in the cost-efficiency of voluntary programs incentivizing tillage reduction and cover-cropping practices. We map county-level predicted rates of adoption for each practice with the greenhouse gas mitigation or carbon sequestration benefits expected from their use. Then, we use these bivariate maps to describe how the cost efficiency of agricultural mitigation efforts is likely to vary spatially in the United States.ResultsOur results suggest the combination of high adoption rates and large reductions in net emissions make reduced tillage programs most cost efficient in the Chesapeake Bay watershed or the Upper Mississippi and Lower Missouri sub-basins of the Mississippi River. For programs aiming to reduce net emissions by incentivizing cover-cropping, we expect cost-efficiency to be greatest in the areas near the main stem of the Mississippi River within its Middle and Lower sections.ConclusionsMany voluntary agricultural conservation programs offer the same incentives across the United States. Yet spatial variation in profitability and efficacy of conservation practices suggest that these uniform approaches are not cost-effective. Spatial targeting of voluntary agricultural conservation programs has the potential to increase the cost-efficiency of these programs due to regional heterogeneity in the profitability and greenhouse gas mitigation benefits of agricultural land management practices across the continental United States. We illustrate how predicted rates of adoption and greenhouse gas sequestration might be used to target regions where efforts to incentivize cover-cropping and reductions in tillage are most likely to be cost -effective.

DESIGN AND NUMERICAL INVESTIGATIONS OF AN AFTERBURNER SYSTEM USING METHANE-HYDROGEN BLENDS

The gas turbine industry strongly committed to develop gas turbines operating with 100% hydrogen till 2030, such fully supporting the transformation of the European natural gas grid into a renewable-based energy system by overcoming technical challenges and ensuring that this transformation takes place swiftly. By extending the fuel capabilities of gas turbines to hydrogen, their role can become predominant in the energy transition period but also in long-term energy strategies. In combined cycle configuration (CCGT), gas turbines are already the cleanest form of thermal power generation. For the same amount of electricity generated, gas turbines running on natural gas emit 50% less CO2 emissions than coal-fired power plants. Mixing renewable gas (e.g., green hydrogen, biogas) with natural gas enables further reduction in net CO2 emissions. In this paper pure hydrogen and blends of hydrogen methane will be studied as fuel in order to predict the behavior of afterburner system with a new designed geometry.

Reducing poverty in the UK to mitigate energy poverty by the 10% and LIHC indicators: What tax changes are needed, and what are the consequences for CO2 emissions?

Energy poverty is driven by four factors: poverty; high energy prices; energy-inefficiency; and specific household characteristics. Increasingly refined definitions of energy poverty (and/or vulnerability) identify types or locations of households most likely to be suffering it. But there is also a place for a different approach, considering poverty reduction directly, as poverty is a necessary component within all energy poverty definitions. This paper investigates how high the UK's top marginal tax rates would need to be, to provide funds to lift low-income UK households above the poverty threshold as defined by the low-income-high-cost (LIHC) and 10% energy poverty indicators. It finds that the increased top tax rates would still be in line with those of other European OECD countries. Using recent and new research on income elasticities of CO2 emissions, it then estimates the net direct effects on CO2 emissions of this redistribution. For both scenarios the most likely effect is a small reduction in net CO2 emissions. Further, indirect downward pressures on CO2 emissions due to reduced income among the highest earners are likely to lead to yet more favourable outcomes for net CO2 emission reduction.