Where do greenhouse gas emissions come from?

Greenhouse gases such as carbon dioxide are mostly cycled through the atmosphere, earth, and ocean, meaning that carbon is only added to the system in a few areas. Natural sources of carbon and carbon dioxide include volcanoes, while human sources include all types of industry (factories and electricity production) as well as automobiles Carbon terms such as plant respiration and the ocean are much, much larger than what humans emit, but the key is the carbon balance over time (as these terms are generally balanced by subsequent photosynthesis and reuptake, respectively). Other greenhouse gases such as methane are natural as well, but also have contributions from humans.

These sources include livestock, and landfills, and cultivation of crops such as rice Water vapor is by far the most abundant greenhouse gas, but it has no emissions; it is cycled through the atmosphere with a residence time of a few days, and therefore doesn't build up. Most of the remaining greenhouse gases are entirely anthropogenic, such as the halocarbons and CFCs. They exist in very small concentrations in the atmosphere, but are very powerful and remain in the atmosphere for a very long time Greenhouse gases that we can do something about are carbon dioxide and methane, largely.

Carbon dioxide is emitted whenever fossil fuel (coal, oil and natural gas) is burnt usually to produce electricity, or to power transport. Methane comes from garbage rotting in landfill dumps, and from farm animals, mostly cows, belching A: Greenhouse gases naturally blanket the Earth and keep it about 33 degrees Celsius warmer than it would be without these gases in the atmosphere. Greenhouse gases like water vapour, carbon dioxide, and methane trap the sun's heat and prevent it all radiating out to space This is called the Greenhouse Effect and is a natural effect supported by the water and carbon cycles of the earth When we discovered and started burning fossil fuels (coal, oil and natural gas) at the start of the Industrial Age we began releasing tons of extra carbon dioxide that had been stored underground since the time when fossil fuels were first laid down.

We also cut down vast forests which had been storing carbon in their trunks and branches. All this means that more carbon dioxide moves into the atmosphere as a greenhouse gas More details: The greenhouse effect is the heating of the Earth due to the presence of greenhouse gases. It is named this way because of a similar effect produced by the glass panes of a greenhouse.

Shorter-wavelength solar radiation from the sun passes through Earth's atmosphere, then is absorbed by the surface of the Earth, causing it to warm. Part of the absorbed energy is then reradiated back to the atmosphere as long wave infared radiation. Little of this long wave radiation escapes back into space; the radiation cannot pass through the greenhouse gases in the atmosphere.

The greenhouse gases selectively transmit the infared waves, trapping some and allowing some to pass through into space. The greenhouse gases absorb these waves and reemits the waves downward, causing the lower atmosphere to warm.

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