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  2. Greenhouse gas | Definition, Emissions, & Greenhouse Effect ...

    www.britannica.com/science/greenhouse-gas

    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.

  3. Overview of Greenhouse Gases | US EPA - U.S. Environmental ...

    www.epa.gov/ghgemissions/overview-greenhouse-gases

    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.

  4. What Are Greenhouse Gases and Why Do They Matter

    www.climate.gov/ghg/what-are-greenhouse-gases-and-why-do...

    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). Though they make up only a small portion of the atmosphere (less than 1% of all air molecules), GHGs absorb a significant amount of heat energy and re ...

  5. What Are Greenhouse Gas Emissions? - IBM

    www.ibm.com/topics/greenhouse-gas-emissions

    Greenhouse gas emissions are certain gases released into the atmosphere that create agreenhouse effect”. Heat becomes trapped and global temperatures rise.

  6. Greenhouse gas emissions - Wikipedia

    en.m.wikipedia.org/wiki/Greenhouse_gas_emissions

    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 one of the most important factors in causing climate change.

  7. Greenhouse Gases - MIT Climate Portal

    climate.mit.edu/explainers/greenhouse-gases

    Greenhouse gases are gaseslike 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 .

  8. What is the greenhouse effect? - NASA Science

    science.nasa.gov/climate-change/faq/what-is-the-greenhouse...

    The greenhouse effect is the process through which heat is trapped near Earth’s surface by substances known as ‘greenhouse gases.’ Imagine these gases as a cozy blanket enveloping our planet, helping to maintain a warmer temperature than it would have otherwise.

  9. Overview of Greenhouse Gases | Greenhouse Gas (GHG) Emissions ...

    19january2021snapshot.epa.gov/ghgemissions/overview...

    Information on emissions and removals of the main greenhouse gases to and from the atmosphere.

  10. Greenhouse gases, facts and information - National Geographic

    www.nationalgeographic.com/.../article/greenhouse-gases

    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.

  11. Greenhouse gases (GHGs) in the atmosphere trap infrared radiation from the Earth, keeping it warm, this is known as the greenhouse effect. GHG emissions from human activities provided the majority contribution towards global warming of 1.1 °C.