Greenhouse gas - Wikipedia
Greenhouse gases (GHGs) are the gases in the atmosphere that raise the surface temperature of planets such as the Earth. What distinguishes them from other gases is that they absorb the wavelengths of radiation that a planet emits, resulting in the greenhouse effect. [1]
Overview of Greenhouse Gases | US EPA
Jan 16, 2025 · 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.
What Are Greenhouse Gases and Why Do They Matter
Oct 12, 2022 · 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).
Greenhouse gas | Definition, Emissions, & Greenhouse Effect
Dec 19, 2024 · 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 - MIT Climate Portal
May 22, 2023 · 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 .
Greenhouse gases, facts and information - National Geographic
May 13, 2019 · Carbon dioxide, a key greenhouse gas that drives global climate change, continues to rise every month. Find out the dangerous role it and other gases play. By trapping heat from the sun,...
Greenhouse effect | Definition, Diagram, Causes, & Facts
Jan 17, 2025 · Greenhouse effect, a warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapor, carbon dioxide, methane, and certain other gases in the air. Of those gases, known as greenhouse gases, …
Current GHG Levels - NOAA Climate.gov
The Annual Greenhouse Gas Index (or AGGI) is a measure that tracks the global warming influence of all human-emitted greenhouse gases, which was 51 percent higher in 2023 than it was in 1990. Together, these gases trapped nearly 3.5 extra Watts of heat energy per square meter in 2023 compared to 1750.
Climate Change Indicators: Greenhouse Gases | US EPA
Dec 26, 2024 · Learn more about the Greenhouse Gas Reporting Program and explore data by facility, industry, location, or gas using a data visualization and mapping tool called FLIGHT. You can also review state- or Tribal-specific emissions using interactive fact sheets and download detailed data via EPA's Envirofacts database.
Greenhouse Gas (GHG) Emissions and Removals | US EPA
Dec 20, 2024 · Learn about the most important GHGs and opportunities for reducing emissions. Where do GHGs come from? See the human activities that add GHGs to our atmosphere and options to cut emissions. Find out more about global greenhouse gas emissions and trends and capacity building for national GHG inventories.