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Overview of Greenhouse Gases | US EPA
Gases that trap heat in the atmosphere are called greenhouse gases. This section provides information on emissions and removals of the main greenhouse gases to and from the atmosphere. Click on a greenhouse gas below to learn about its emissions in more detail.
Greenhouse gas - Wikipedia
Greenhouse gases trap some of the heat that results when sunlight heats the Earth's surface. Three important greenhouse gases are shown symbolically in this image: carbon dioxide, water vapor, and methane. Physical drivers of global warming that has happened so far.
What Are Greenhouse Gases and Why Do They Matter
Greenhouse gases (GHGs) are a category of gases that absorb heat energy emitted from the planet's surface and they remain in Earth's atmosphere for a long time (from decades to centuries).
Definition, Emissions, & Greenhouse Effect - Britannica
greenhouse gas, any gas that has the property of absorbing infrared radiation (net heat energy) emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the greenhouse effect. Carbon dioxide, methane, and water vapour are the most important greenhouse gases.
Greenhouse gases - U.S. Energy Information Administration (EIA)
Many of the chemical compounds in the earth's atmosphere act as greenhouse gases. When sunlight strikes the earth's surface, some of it radiates back toward space as infrared radiation (heat).
Greenhouse Gases | Earth.gov
Greenhouse gases (GHGs) refers to a suite of gases, including carbon dioxide and methane, found in Earth's atmosphere that naturally trap heat and maintain Earth's global temperature.
Greenhouse Gases - MIT Climate Portal
Greenhouse gases are gases—like carbon dioxide (CO 2), methane, and nitrous oxide—that keep the Earth warmer than it would be without them. The reason they warm the Earth has to do with the way energy enters and leaves our atmosphere. When energy from the sun first reaches us, it does so mainly as light.
Greenhouse gases - World Meteorological Organization
According to WMO’s Greenhouse Gas Bulletin, released in 2025, atmospheric levels of the three main greenhouse gases - carbon dioxide, methane and nitrous oxide all reached levels not seen for 16 million years, when the Earth was much warmer than the present day.
Greenhouse Gases Factsheet | Center for Sustainable Systems
Greenhouse gases (GHGs) in the atmosphere prevent some of this heat from escaping into space, instead reflecting the energy back to further warm the surface. 1 The greenhouse effect was first described in the 1820s.
Greenhouse Gas Emissions from Energy Data Explorer
The database includes estimates of total GHG emissions from energy and related indicators, covering CO 2, CH 4 and N 2 O emissions from fuel combustion, as well as fugitive emissions. Energy accounts for more than three-quarters of total greenhouse gas (GHG) emissions globally.
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