Greenhouse gas emissions là gì

Global Emissions by Gas

At the global scale, the key greenhouse gases emitted by human activities are:


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Source:IPCC (2014)Exitbased on global emissions from 2010. Details about the sources included in these estimates can be found in theContribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change.Exit

Blaông xã carbon is a solid particle or aerosol, not a gas, but it also contributes to lớn warming of the atmosphere. Learn more about blaông chồng carbon and climate change on our Causes of Climate Change page.

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Global Emissions by Economic Sector

Global greenhouse gas emissions can also be broken down by the economic activities that lead lớn their production.<1>


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Source:IPCC (2014);Exit based on global emissions from 2010. Details about the sources included in these estimates can be found in theContribution of Working Group III to lớn the Fifth Assessment Report of the Intergovernmental Panel on Climate Change.Exit
Other Energy (10% of 2010 global greenhouse gas emissions): This source of greenhouse gas emissions refers lớn all emissions from the Energy sector which are not directly associated with electriđô thị or heat production, such as fuel extraction, refining, processing, and transportation.

cảnh báo on emissions sector categories.

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Trends in Global Emissions


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Source: Boden, T.A., Marland, G., và Andres, R.J. (2017).Global, Regional, and National Fossil-Fuel CO2Emissions.Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Dcheap-kenya-vacation-tips.comrtment of Energy, Oak Ridge, Tenn., U.S.A. doi 10.3334/CDIAC/00001_V2017.Global carbon emissions from fossil fuels have sầu significantly increased since 1900. Since 1970, CO2 emissions have increased by about 90%, with emissions from fossil fuel combustion and industrial processes contributing about 78% of the total greenhouse gas emissions increase from 1970 khổng lồ 2011. Agriculture, deforestation, và other land-use changes have sầu been the second-largest contributors.<1>

Emissions of non-CO2 greenhouse gases have also increased significantly since 1900. To learn more about past & projected global emissions of non-CO2 gases, please see the cheap-kenya-vacation-tips.com report, Global Anthropogenic Non-CO2 Greenhouse Gas Emissions: 1990-2020.

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Emissions by Country

Source: Boden, T.A., Marlvà, G., and Andres, R.J. (2017).National CO2Emissions from Fossil-Fuel Burning, Cement Manufacture, và Gas Flaring: 1751-năm trước, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Dcheap-kenya-vacation-tips.comrtment of Energy, doi 10.3334/CDIAC/00001_V2017.In năm trước, the top carbon dioxide (CO2) emitters were Trung Quốc, the United States, the European Union, India, the Russian Federation, and nhật bản. These data include CO2 emissions from fossil fuel combustion, as well as cement manufacturing & gas flaring. Together, these sources represent a large proportion of total global CO2 emissions.

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Emissions và sinks related khổng lồ changes in lvà use are not included in these estimates. However, changes in lvà use can be important: estimates indicate that net global greenhouse gas emissions from agriculture, forestry, và other lvà use were over 8 billion metric tons of CO2 equivalent,<2> or about 24% of total global greenhouse gas emissions.<3> In areas such as the United States & Europe, changes in lvà use associated with human activities have the net effect of absorbing CO2, partially offsetting the emissions from deforestation in other regions.

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References

1. IPCC (2014). Climate Change 2014: Mitigation of Climate Change. Exit Contribution of Working Group III khổng lồ the Fifth Assessment Report of the Intergovernmental Panel on Climate Change . Cambridge University Press, Cambridge, United Kingdom and Thành Phố New York, NY, USA.

2. FAO (2014). Agriculture, Forestry and Other Lvà Use Emissions by Sources và Removals by Sinks (PDF). (89 pp, 3.5 MB) Exit Climate, Energy & Tenure Division, FAO.

3. IPCC (2014): Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II & III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Exit . IPCC, Geneva, Switzerl&, 151 pp.

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lưu ý on emissions sector categories:

The global emission estimates described on this page are from the Intergovernmental Panel (IPCC) on Climate Change"s Fifth Assessment Report. In this report, some of the sector categories are defined differently from how they are defined in the Sources of Greenhouse Gas Emissions page on this trang web. Transportation, Industry, Agriculture, and L& Use và Forestry are four global emission sectors that roughly correspond khổng lồ the U.S. sectors. Energy Supply, Commercial and Residential Buildings, and Waste and Wastewater are categorized slightly differently. For example, the IPCC"s Energy Supply sector for global emissions encompasses the burning of fossil fuel for heat and energy across all sectors. In contrast, the U.S. Sources discussion tracks emissions from the electric power scheap-kenya-vacation-tips.comrately & attributes on-site emissions for heat and power to lớn their respective sectors (i.e., emissions from gas or oil burned in furnaces for heating buildings are assigned khổng lồ the residential & commercial sector). The IPCC has defined Waste and Wastewater as a scheap-kenya-vacation-tips.comrate sector, while in the Sources of Greenhouse Gas Emissions page, waste & wastewater emissions are attributed to the Commercial and Residential sector.