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
Greenhouse Gas (GHG) Emissions and Removals | US EPA Learn about the most important GHGs Where do GHGs come from? Learn about the human activities that add GHGs to our atmosphere Find out more about global greenhouse gas emissions and trends Learn about corporate GHG management and use the Emission Factors Hub and Corporate GHG Emission Calculator
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)
Welcome — U. S. Greenhouse Gas Center This multi-agency effort consolidates greenhouse gas information from observations and models to create a unified source for U S government and other datasets The goal of the US GHG Center is to provide decision makers with one location for data and analysis
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 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
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