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  1. Greenhouse gas emissions - Wikipedia

    Emissions from human activities have increased atmospheric carbon dioxide by about 50% over pre-industrial levels. The growing levels of emissions have varied, but have been consistent among all …

  2. Overview of Greenhouse Gases | US EPA

    Dec 29, 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 …

  3. Greenhouse gas emissions - Our World in Data

    How do greenhouse gas emissions vary across the world? This interactive chart shows annual greenhouse gas emissions — the amount a given country produces each year — across the world.

  4. 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).

  5. What are greenhouse gas (GHG) emissions? - IBM

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

  6. Earth.gov

    Dec 18, 2025 · Greenhouse gases (GHGs) in the Earth's atmosphere trap heat and slow heat loss into space. Increases in the concentrations of greenhouse gases, from burning fossil fuels, have caused …

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

    Jan 16, 2026 · 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 …

  8. Greenhouse gases - World Meteorological Organization

    Feb 3, 2026 · 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 …

  9. The Energy & Environmental Research Center (EERC) at the University of North Dakota (UND) compiled a high-level greenhouse gas (GHG) inventory of the state of North Dakota in support of the …

  10. 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 …