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Greenhouse gas (GHG) emissions from human activities intensify the greenhouse effect. This contributes to climate change . Carbon dioxide (CO 2 ), from burning fossil fuels such as coal , oil , and natural gas , is the main cause of climate change.
The chart at right attributes anthropogenic greenhouse gas emissions to eight main economic sectors, of which the largest contributors are power stations (many of which burn coal or other fossil fuels), industrial processes, transportation fuels (generally fossil fuels), and agricultural by-products (mainly methane from enteric fermentation and ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 February 2025. Gas in an atmosphere with certain absorption characteristics This article is about the physical properties of greenhouse gases. For how human activities are adding to greenhouse gases, see Greenhouse gas emissions. Greenhouse gases trap some of the heat that results when sunlight heats ...
The greenhouse effect occurs when greenhouse gases in a ... How CO 2 causes the greenhouse effect. ... The aerosol climate effects are the biggest source of ...
Globally averaged atmospheric concentration and its annual growth rate. [17] In April 2022, NOAA reported an annual increase in global atmospheric methane of 17 parts per billion (ppb) in 2021—averaging 1,895.7 ppb in that year—the largest annual increase recorded since systematic measurements began in 1983; the increase during 2020 was 15.3 ppb, itself a record increase.
The dangers of extreme weather events will continue increasing unless there is a rapid decrease in greenhouse gas emissions needed to curb further warming. [1]: 15 [2]: 33 Increased warming will lead to worse impacts. [1]: 15 [2]: 21 The extent of human-caused emissions will be the main cause of future warming.