Increase In Carbon Dioxide Emissions Research Articles

Common use herbicides increase wetland greenhouse gas emissions

Wetlands play a disproportionate role in the global climate as major sources and sinks of greenhouse gases. Herbicides are the most heavily used agrochemicals and are frequently detected in aquatic ecosystems, with glyphosate and 2,4-Dichlorophenoxyacetic acid (2,4-D), representing the two most commonly used worldwide. In recent years, these herbicides are being used in mixtures to combat herbicide-tolerant noxious weeds. While it is well documented that herbicide use for agriculture is expected to increase, their indirect effects on wetland greenhouse gas dynamics are virtually unknown. To fill this knowledge gap, we conducted a factorial microcosm experiment using low, medium, and high concentrations of glyphosate or 2,4-D, individually and in combination to investigate their effects on wetland methane, carbon dioxide, and nitrous oxide fluxes. We predicted that mixed herbicide treatments would have a synergistic effect on greenhouse gases compared to individual herbicides. Our results showed that carbon dioxide flux rates and cumulative emissions significantly increased from both individual and mixed herbicide treatments, whereas methane and nitrous oxide dynamics were less affected. This study suggests that extensive use of glyphosate and 2,4-D may increase carbon dioxide emissions from wetlands, which could have implications for climate change.

CARBON FOOTPRINT REDUCTION USING GEOPOLYMER CONCRETE

The size and complex nature of today's construction project resulted in a global increase of the carbon footprint. Increased carbon dioxide emissions results in a severe deterioration to the environment and negative health implications. Recent studies showed that the production of 1 metric ton of portland cement results in the evolution of 0.9 metric tons of carbon dioxide. At this rate, the construction industry represents a significant threat on mankind. This paper presents geopolymer (cement-free) concrete applications in the United States local construction market. Geopolymer concrete production depends on the activation of a pozzolanic supplementary cementitious material (SCM) with a high aluminosilicate content using alkaline solution as sodium hydroxide (NaOH). The SCM activated material-known as precursor-forms a three-dimensional polymer that binds the aggregates instead of hydrated portland cement. The widespread of geopolymer concrete will significantly reduce the need to portland cement; hence, reduces the carbon emissions resulting from cement production. In addition to the environmental advantages, geopolymer concrete is highly durable due to the fine size of SCMs particles. Geopolymer concrete is more resistant to alkali-silica reactivity, and early age cracking. The widespread of geopolymer concrete in construction industry, especially in infrastructure projects, will result in significant improvement in projects condition, and lower the need to frequent maintenance, repair, and replacement of projects.

Does environmental policy stringency alter the natural resources-emissions nexus? Evidence from G-7 countries

Natural resource management is indispensable keeping in view their positive economic impacts as well as their detrimental environmental consequences. To achieve certain SDGs, it is inevitable to manage natural resources through effective policies that help to inhibit adverse environmental impacts. Based on this approach, the current empirical analysis aims to probe whether environmental policy stringency intensifies, meagres, and/or halts the abysmal environmental impact of natural resources in G-7 countries (United Kingdom, United States, Canada, Italy, France, Japan, and Germany) for the period from 1990 to 2020. To that end, we rely on the second-generation panel data approaches and panel quantile regression. The outcomes reveal that natural resources increase carbon dioxide emission whereas the synergy of natural resources and environmental policy stringency plunges emissions across the quantiles. These findings suggest adoption of a strict environmental policy for attaining the targets of SGD-08 (economic growth), SDG-09 (innovations), SDG-11 (sustainable cities), SDG-12 (responsible consumption of natural resources), and SDG-13 (climate action).

Kilometre-scale simulations over Fennoscandia reveal a large loss of tundra due to climate warming

Abstract. The Fennoscandian boreal and mountain regions harbour a wide range of vegetation types, from boreal forest to high alpine tundra and barren soils. The area is facing a rise in air temperature above the global average and changes in temperature and precipitation patterns. This is expected to alter the Fennoscandian vegetation composition and change the conditions for areal land use such as forestry, tourism and reindeer husbandry. In this study we used a unique high-resolution (3 km) climate scenario with considerable warming resulting from strongly increasing carbon dioxide emissions to investigate how climate change can alter the vegetation composition, biodiversity and availability of suitable reindeer forage. Using a dynamical vegetation model, including a new implementation of potential reindeer grazing, resulted in simulated vegetation maps of unprecedented high resolution for such a long time period and spatial extent. The results were evaluated at the local scale using vegetation inventories and for the whole area against satellite-based vegetation maps. A deeper analysis of vegetation shifts related to statistics of threatened species was performed in six “hotspot” areas containing records of rare and threatened species. In this high-emission scenario, the simulations show dramatic shifts in the vegetation composition, accelerating at the end of the century. Alarmingly, the results suggest the southern mountain alpine region in Sweden will be completely covered by forests at the end of the 21st century, making preservation of many rare and threatened species impossible. In the northern alpine regions, most vegetation types will persist but shift to higher elevations with reduced areal extent, endangering vulnerable species. Simulated potential for reindeer grazing indicates latitudinal differences, with higher potential in the south in the current climate. In the future these differences will diminish, as the potentials will increase in the north, especially for the summer grazing grounds. These combined results suggest significant shifts in vegetation composition over the present century for this scenario, with large implications for nature conservation, reindeer husbandry and forestry.

Integrated Carbon Dioxide Capture and Conversion to Methanol Utilizing Tertiary Amines over a Heterogenous Cu/ZnO/Al2O3 Catalyst.

Increasing carbon dioxide emissions has sparked a growing interest in capturing these emissions at the source of their release. For such processes, amines can be used as carbon dioxide capture agents. Herein, CO2 was captured under ambient conditions using solutions of amines and polyamines in ethylene glycol. The captured solutions were then successfully hydrogenated to methanol under hydrogen pressure with a heterogeneous Cu/ZnO/Al2O3 industrial catalyst. An extensive amine scope found that tetramethyl-1,6-hexanediamine, with two tertiary amine sites, provided the highest methanol productivity. This reaction was then optimized to achieve up to 89% methanol yield under relatively mild conditions of 250 °C and 80 bar H2 pressure. The catalyst was shown to be recyclable over five reaction cycles.

Effect of Calcination on the Ash from Lokon Volcano and Its Potentially Sustainable Binder Material

The need for cement as a housing construction material has continued to increase due to the growing population. This high demand increases carbon dioxide emissions. Hence, it is necessary to optimize the use of natural pozzolan material. Volcanic ash is a natural pozzolan material in North Sulawesi, but its use could be more optimal. This study aimed to determine the effect of calcination on the physical properties of volcanic ash originating from the eruption of Mount Lokon. The calcination was carried out to determine the potential of Lokon ash at different temperatures to assess the structural characteristics, mineral phases, metal oxide composition, functional group bonding, morphology, and its potential as a binder for concrete mixtures. The ash material used comes from sand taken from the Pasahapen River and filtered through a 325-mesh sieve. Lokon ash was calcined at temperatures of 800, 900, and 1000oC to determine the structural and morphological characteristics. At the same time, the effects were examined using an X-ray diffractometer (XRD), Raman spectroscopy, X-ray fluorescence (XRF), Fourier Transform InfraRed (FTIR), and Scanning Electron Microscopy (SEM). The results showed that calcination triggered the formation of hematite in the ash, which will increase its reactivity as a pozzolan material. This process causes the crystallinity of ash minerals to increase, but the ash material produced is predominantly amorphous. Hence, it has excellent potential as a binder material in concrete mixtures.

Effect of Calcination on the Ash from Lokon Volcano and Its Potentially Sustainable Binder Material

The need for cement as a housing construction material has continued to increase due to the growing population. This high demand increases carbon dioxide emissions. Hence, it is necessary to optimize the use of natural pozzolan material. Volcanic ash is a natural pozzolan material in North Sulawesi, but its use could be more optimal. This study aimed to determine the effect of calcination on the physical properties of volcanic ash originating from the eruption of Mount Lokon. The calcination was carried out to determine the potential of Lokon ash at different temperatures to assess the structural characteristics, mineral phases, metal oxide composition, functional group bonding, morphology, and its potential as a binder for concrete mixtures. The ash material used comes from sand taken from the Pasahapen River and filtered through a 325-mesh sieve. Lokon ash was calcined at temperatures of 800, 900, and 1000oC to determine the structural and morphological characteristics. At the same time, the effects were examined using an X-ray diffractometer (XRD), Raman spectroscopy, X-ray fluorescence (XRF), Fourier Transform InfraRed (FTIR), and Scanning Electron Microscopy (SEM). The results showed that calcination triggered the formation of hematite in the ash, which will increase its reactivity as a pozzolan material. This process causes the crystallinity of ash minerals to increase, but the ash material produced is predominantly amorphous. Hence, it has excellent potential as a binder material in concrete mixtures.

Examining the agriculture-induced environment curve hypothesis and pollution haven hypothesis in Rwanda: the role of renewable energy

Agriculture has a main impact on increasing the economy of most developing countries, and energy policies in fighting climate change have a vital role in strengthening economic growth. This paper studies the impact of agriculture, trade openness and green energy on CO2 emissions in Rwanda during 1990–2022. Phillips- Peron and Augmented Dickey fuller unit root test affirmed the stationary of data, and autoregressive distributed lag (ARDL)-bound testing confirmed a long-run relationship among variables. The study employed an ARDL approach.Findings from long-run elasticities showed that 1% increase in agriculture productivity increased carbon dioxide emissions by 1.94%; 1% increase in trade openness increased carbon dioxide emissions by 0.16%; whereas 1% increase in renewable energy consumption and GDP per capita decreased carbon dioxide emissions by 2.71% and 2%, respectively. The result confirmed the induced environment curve and the pollution haven hypothesis in Rwanda. Moreover, green energy consumption and GDP per capita decreases CO2 emissions eventually, which supports the validity of environment Kuznets curve in Rwanda.The findings recommend that an increase in renewable energy usage and trade reforms accompanied by strong environmental policies to reduce CO2 emissions will develop the agriculture sector and regional economy.Graphical

Soil improvement using agar gum polymer for seismic liquefaction mitigation

Liquefaction can cause ground subsidence and structural collapses, which could result in considerable damage. While numerous preventive methods have been proposed to prevent such liquefaction, most of these methods involve cement-based reinforcements, thus potentially introducing other environmental problems, such as groundwater contamination and increased carbon dioxide emissions. Therefore, it is essential to develop and use eco-friendly, ground-reinforcement materials. Agar gum is an eco-friendly biopolymer extracted as a result of the biological activities of microorganisms. Ground-reinforcement of agar gum enhances its effectiveness in improving the unconfined compressive and shear strengths, thus making it a suitable, eco-friendly, ground-reinforcement material. However, while the use of agar gum could (logically) increase the strength of liquefaction resistance, there is insufficient research to support this assumption. Therefore, in this study, the viscosity, unconfined compressive strength, and hardness of agar gum were quantified, and the liquefaction resistance strength was evaluated based on cyclic triaxial tests using agar-gum-treated samples. The hardness, unconfined compressive strength, and liquefaction resistance strength increased with increasing agar gum concentrations, and the change based on a curing time was relatively constant. In addition, the effect of enhancing the liquefaction resistance strength using agar gum was confirmed based on a comparison with previous studies using untreated samples and other reinforcing materials.

Main Themes and Bibliometric Analysis of Conflict and Climate Change Studies

Climate change, thought to cause significant problems if necessary precautions are not taken, causes droughts and natural disasters to occur frequently and severely. The primary resources required for life, such as water, soil, and food, will decrease in such a situation. It is thought that experiencing tensions dependent on resource scarcity will trigger internal and external conflicts, especially in underdeveloped countries with weak central governments and low income levels. On the other hand, because wars cause the use of large amounts of fossil fuels and firearms, they destroy forests and natural resources and increase carbon dioxide emissions, which are considered the most crucial cause of the climate crisis. In other words, while climate changes trigger wars, unfortunately, wars also increase the climate crisis. Especially when war reaches an existential dimension for countries, the risk of non-compliance with these agreements increases even in states that reshape their energy policies with significant investments to prevent climate change. In this study, we examined the Web of Science (Wos) literature on the relationship between climate change, which is seen as a significant threat to our future, and wars through its main themes and bibliometric indicators. In this study, we examined the Web of Science (Wos) literature on the relationship between climate change, which is seen as a significant threat to our future, and wars through its main themes and bibliometric indicators. Looking at the time series, interest in conflict and climate change studies has increased, and most studies have been done mainly in the field of "environmental sciences and ecology". Latent Dirichlet Allocation (LDA) Topic Modeling was applied to the abstracts downloaded in this study to find the main topics of conflict and climate change studies. So, the main topics were food, politics, migration, carbon emissions, and animals.

Designing Carbon‐Based Porous Materials for Carbon Dioxide Capture

AbstractRapid industrialization and urban development around the world have significantly increased carbon dioxide emissions, adversely affecting climate and ecosystems. Therefore, carbon capture and storage emerged as a promising route to reduce environmental CO2 concentration. Among various CO2 capture technologies, adsorption through carbon‐based porous materials has attracted particularly strong attention. This is primarily due to their high specific surface area, selective CO2 adsorption, moderate heat of adsorption, tunable morphology, and reduced degradation in moisture. This review critically examines carbon‐based CO2 sorbents derived from diverse sources. The key factors controlling adsorption performance, including the impact of structural and functional properties are discussed. The future research directions in this rapidly emerging field, contributing to the decarbonization of the global economy and society, are highlighted.

Research on the Impact of Energy on Emission Reduction and Environmental Protection

All nations are concerned about how to deal with the problem of the increasing carbon dioxide emissions in the globe today. By replacing traditional non-renewable energy with clean energy, greenhouse gas emissions can be reduced, thus helping to tackle climate change. Since the industrial revolution, global greenhouse gas emissions and the amount of energy generated from fossil fuels have increased dramatically, resulting in the highest levels of atmospheric carbon dioxide in 400,000 years. Therefore, this article aims to analyze the data on various energy consumption and carbon dioxide emissions by incorporating them into a multiple linear model, in order to identify the impact of different energy sources on carbon dioxide emissions. The results show that only oil, coal, and hydropower have a significant positive correlation with carbon dioxide emissions, while other energy sources do not have a significant relationship. Based on the above analysis, it is hoped to provide some meaningful recommendations.

Research on the Relationship Between Provincial OFDI And Carbon Emissions Under Dual Carbon Targets

With the development of economic globalization and China's continuous high-quality development, China's global status continues to rise, driving more and more companies to "go out" to conduct foreign direct investment overseas in order to seek a larger market, in the face of the two major tasks of "economic development" and "achieving dual carbon goals", studying the impact of foreign direct investment on my country's carbon dioxide emissions has a very important reality for whether our country can achieve economic transformation and fulfill its emission reduction commitments. and guiding significance. Therefore, this article based on the panel data of energy consumption in 30 provinces and regions in China from 2004 to 2019 . At the same time, per capita GDP, technological level, industrial structure, etc. were selected as control variables, a fixed effect model was established, and an empirical analysis was conducted on the carbon emission effects of my country's foreign direct investment by region and time period. Empirical analysis results show that: The increase in the scale of OFDI will promote the increase of carbon dioxide emissions in China, but there are significant differences in the carbon emission effects of various regions. The carbon emission effect of foreign direct investment in the eastern and western regions is significantly higher than that in the central region. Over time, the expansion of foreign direct investment will reduce the increase in carbon dioxide emissions it brings. In addition, the improvement of per capita GDP and industrial structure will increase carbon dioxide emissions, while the improvement of technological level will significantly reduce carbon dioxide emissions. Finally, reasonable policy suggestions are given based on the results of empirical analysis and the current situation of foreign direct investment and domestic carbon dioxide emissions.

Development of a nano-size off-grid energy system using renewables and IoT technologies at the Meteoria visitor center: A Finnish case study

The increased utilization of non-renewable energy during the last century has influenced the climate, with increased carbon dioxide emissions and elevated temperature as a result. Thus, the need to develop and demonstrate new sustainable solutions regarding both energy supply and consumption, but also energy system optimization, is obvious. This case study presents the nano-size off-grid energy system at the Meteoria visitor center in Ostrobothnia, Finland, and the real-time measuring techniques that have been installed to follow up the energy production and consumption. The Meteoria consists of several buildings, which are open to the public from April to October. The case site is operated by energy derived from wind power, solar power, and a diesel generator (as a backup), with batteries for energy storage. The Internet of Things (IoT) has been retrofitted to the existing energy system to enable energy measurements and follow various electrical parameters in real-time. In addition, a graphical visualization platform open to the public has been developed. In this study, the completeness of data sampling and the IoT system was checked, and the results show high availability of data. Furthermore, various errors/limitations regarding the IoT system were identified. The energy supply/demand at the Meteoria in 2021 was monitored and the challenges regarding the existing energy system in a cold climate zone are discussed as well as the potential role of the Meteoria to function as a living lab.

Agricultural soil plastic as a hidden carbon source stimulates microbial activity and increases carbon dioxide emissions

Plastic film mulching is an important agricultural practice, but its accumulation in soil threatens soil health. Here, we explored the effects of plastic film on soil carbon cycling through microcosmic incubation and estimated the excess carbon dioxide (CO2) emissions of farmland soils through Meta-analysis. The results showed that plastic film released dissolved organic carbon (DOC) into the soil, which was rapidly used by microorganisms and accelerated the decomposition of soil organic carbon (SOC), increasing CO2 emissions. Soil moisture content and soil carbon content affected the rate of DOC release from plastic. We estimated that residual plastic film farmland in six northwest provinces of China, 1.39 × 105 tons of excess CO2 emissions in 2020. The soil excess CO2 emissions was influenced by polyethylene (PE) plastic concentration and soil type. Replace PE plastic film with biodegradable film, 1.05 × 106 tons of excess CO2 emissions, 7.5 times that of PE plastics.

The effect of technological progress and income per capita on carbon dioxide emission: the moderating role of economic freedom.

Climate change in context of environmental issues is pushing most of the countries to set the goals in order to achieve carbon neutrality and sustainable development. The recognition of Sustainable Development Goal (SDG) thirteen (13) is aided by the objective of this study which is to take an urgent action to combat climate change. In this context, this study investigates the effect of technological progress, income, and foreign direct investment on carbon dioxide emission by taking into consideration the moderating effect of economic freedom in 165 global countries from 2000 to 2020. The study employed ordinary least squares (OLS), fixed effects (FE), and two-step system generalized method of moments for analysis. The findings reveal that economic freedom, income per capita, foreign direct investment, and industry increase carbon dioxide emission while technological progress reduces emission in global countries. Surprisingly, economic freedom indirectly increases the level of carbon emissions by technological progress; however, economic freedom indirectly decreases the level of carbon emissions by income per capita. In this regard, this study favors clean eco-friendly technologies and seeks methods for development without harming the environment. Furthermore, the findings of this study have considerable policy suggestions for the sample countries.

From Fossil Fuels to Renewables: Analyzing the Pathways to Carbon Emission Reduction in Developing Nations

The present study endeavours to examine the determinants that contribute to the enhancement of environmental quality within specific developing economies while concurrently assessing the validity of transitioning these economies from fossil fuel dependency to renewable energy sources. To achieve this objective, panel data encompassing selected developing economies spanning the period from 2000 to 2022 has been collected from the World Development Indicators database. Fossil fuel consumption is quantified through measures of energy consumption, while renewables are gauged using indicators of renewable energy consumption and renewable electricity consumption. In terms of analytical methodology, both fixed-effect and random-effect models have been employed. The estimated coefficients from the empirical analysis reveal that energy derived from fossil fuels significantly correlates with higher carbon dioxide emissions in the selected developing countries, suggesting that a shift toward renewable energy sources and electricity consumption can serve as an effective strategy for mitigating carbon emissions. Furthermore, the findings indicate that carbon dioxide emissions may be curbed through the facilitation of international trade and the expansion of industrial activities. Conversely, greater levels of foreign direct investment (FDI) and government expenditure appear to be associated with increased carbon dioxide emissions in these developing economies. In light of these findings, it is recommended that the promotion and adoption of renewable energy sources such as solar, wind, hydropower, and geothermal energy be prioritized as a means of effectively reducing carbon emissions and fostering environmental sustainability within these developing nations.

지속가능한 성장을 위한 항공운송과 물류네트워크의 역할

Purpose : The purpose of this study is to analyze the impact of air transport, logistics networks, economic growth, and industrialization on CO2 emissions generated in the transportation sector Research design, data and methodology : Panel data related to air transport, shipping connectivity index, GDP, and industrialization was collected from 2006 to 2014, and panel unit root tests and panel cointegration tests were conducted to confirm the stability and long-term causal relationship of the data. Subsequently variables affecting carbon dioxide were identified using panel FMOLS and panel DOLS, and the causal relationship between these variables was analyzed through panel Granger causal analysis Results : According to panel FMOLS and panel DOLS analysis, air transport and logistics networks reduce carbon dioxide, but economic growth increases carbon dioxide emissions. Conclusions : From a logistics perspective, air transport is influenced by GDP, while logistics networks are impacted by carbon dioxide emissions generated in the transportation sector. However, when considering the long-term viewpoint, it has been recognized that these factors affect industrialization and GDP

Sectoral growth and carbon dioxide emission in Africa: can renewable energy mitigate the effect?

Owing to increased energy consumption, the growth of various sectors of economies has the tendency to increase carbon dioxide emissions, a major component of greenhouse gases that causes climate change and global warming. A suggested panacea is to increase the development and usage of renewable energy which is cleaner and emits less carbon dioxide. In this study the carbon dioxide emission effect of growth in the agricultural sector, industrial sector, and service sector is assessed. It goes on to analyse the moderation role of renewable energy in the sectoral growth-carbon dioxide emissions nexus. Using data from 32 African countries for the period 2002–2021, the study finds that expansion in agricultural sector, industrial sector and service sector exerts upward pressure on carbon dioxide emissions for the region while renewable energy reduces carbon emissions. Furthermore, renewable energy interacts with the agricultural and industrial sectors to reduce their impact on carbon emissions while the opposite is observed for the service sector. Other findings are that trade openness, urbanization and income increase carbon dioxide emissions. The study recommends the need to remove financial impediments that constrain firms operating in the various sectors of African economies. This will enhance their acquisition of efficient technologies for operations in order to reduce carbon dioxide emissions. Also, governments in the region should increase financial support for the development and adoption of renewable energy. Incentives should be introduced to “lure” firms to adopt renewable energy. Imposition of a heavy tax on firms in the service sector whose operations cause higher emission may help ensure the sector becomes environmentally friendly.

New Thermal Insulation Materials Based on Mahogany Sawdust and Polyurethane Foam for Buildings

Global energy consumption has increased in the last few decades and is the third largest contributor to global energy consumption and one of the causes of increased carbon dioxide emissions. Therefore, in this study utilizing sawdust mahogany as a thermal insulation material to overcome the above problems. Sawdust material is combined with polyurethane foam to produce optimal physical, mechanical, and thermal insulation properties. From the study results it was found that the density of the thermal insulation material increased with the addition of sawdust. The value of the density is in the range of 0.041-0.052 gr/cm3. Observations using the secondary electron image (SEI) on thermal insulation materials show that the amount of sawdust added will affect the formation of an open pore cell structure which is directly proportional to the addition of sawdust. In addition, the more sawdust that is added will change the arrangement of cells and reduce the mechanical properties of the thermal insulation material. This is confirmed by the results of the hardness test which decreases with the addition of sawdust with the lowest value of 16.6 shore C for the addition of 10% sawdust. The thermal conductivity of the thermal insulation material has a value of 0.052, 0.038, 0.033, 0.032, and 0.033 W/mK for the addition of 0.2.5%, 5%, 7.5% and 10% sawdust, respectively. This shows that the thermal insulation material made in this study can be used as an alternative to thermal insulation material