The increase in concentration of greenhouse gases in the atmosphere is primarily attributed to several human and natural activities. Here are three major causes:
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Fossil Fuel Combustion: The burning of fossil fuels (such as coal, oil, and natural gas) for energy production, transportation, and industrial processes releases significant amounts of carbon dioxide (CO2) and other greenhouse gases into the atmosphere.
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Deforestation and Land Use Changes: The clearing of forests for agriculture, urban development, and other land uses reduces the number of trees available to absorb CO2. Additionally, the act of cutting down and burning trees releases stored carbon dioxide, further contributing to greenhouse gas emissions.
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Agricultural Practices: Agricultural activities, particularly livestock production and rice cultivation, produce significant amounts of methane (CH4) and nitrous oxide (N2O). Methane is released during enteric fermentation in ruminant animals and from manure management, while nitrous oxide is emitted from the use of synthetic fertilizers and organic amendments.
These activities contribute significantly to the ongoing increase in greenhouse gas concentrations, which are a major driver of climate change.