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] .

2025年1月16日 · 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 …

6 天之前 · 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.

GHG Protocol supplies the world's most widely used greenhouse gas accounting standards and guidance. Our tools enable companies to develop comprehensive and reliable inventories of their GHG emissions. We offer multiple online learning solutions on the world's most widely used GHG accounting standards.

2022年10月12日 · 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).

2025年2月26日 · 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.

2024年9月10日 · At the global scale, the key greenhouse gases emitted by human activities are: Carbon dioxide (CO2): 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.

2023年5月22日 · 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.

2024年10月23日 · Greenhouse gases are part of Earth's atmosphere. This is why Earth is often called the 'Goldilocks' planet – its conditions are just right, not too hot or too cold, allowing life to thrive. Part of what makes Earth so amenable is its natural greenhouse effect, which maintains an average temperature of 15 ° C (59 ° F) .

Current GHG Levels NOAA's Global Greenhouse Gas Reference Network measures and monitors changes in the amounts of GHGs in the atmosphere over time. Measurements are made from air samples taken from many locations around the world.