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Bookmark or Share- Global Greenhouse Gas Overview | US EPAGlobal Emissions and Removals by Gas. At the global scale, the key greenhouse gases emitted by human activities are: Carbon dioxide (CO 2): Fossil fuel use is the primary source of CO 2.CO 2 can also be emitted from the landscape through deforestation, land clearance for agriculture or development, and degradation of soils. Likewise, land management can also remove additional CO 2 from the ...
- A Review of the Agriculture Sector in CALABARZON | Philippine ...In 2002, CALABARZON registered 282.7 thousand farms for agricultural use, covering 588.5 thousand hectares. The region's total agricultural land area comprised 36.3 percent of the region's total land area. As the number of farms decreased by 11.6 percent and agricultural land area by 16.3 percent over the 1991 estimates, the average farm size likewise decreased from 2.20 hectares per farm in ...
- The Greenhouse Effect and our Planet - National Geographic SocietyThe greenhouse effect happens when certain gases, which are known as greenhouse gases, accumulate in Earth’s atmosphere. Greenhouse gases include carbon dioxide (CO 2), methane (CH 4), nitrous oxide (N 2 O), ozone (O 3), and fluorinated gases.. Greenhouse gases allow the sun’s light to shine onto Earth’s surface, and then the gases, such as ozone, trap the heat that reflects back from ...
- Greenhouse gas - WikipediaThe five most abundant greenhouse gases in Earth's atmosphere, listed in decreasing order of average global mole fraction, are: [5] [6] water vapor, carbon dioxide, methane, nitrous oxide, ozone. Other greenhouse gases of concern include chlorofluorocarbons (CFCs and HCFCs ), hydrofluorocarbons (HFCs), perfluorocarbons, SF. 6, and NF.
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