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Sagot :
Answer:
The presence of water vapour, carbon dioxide, methane, and other gases in the air causes the greenhouse effect, which causes warming of the Earth's surface and troposphere (the lowest layer of the atmosphere). Water vapour, the most potent of the greenhouse gases, has the most impact.
This is how I understand it,
- Light can have many colours.
Some of these colours are invisible to the human eye. Infrared light is an example.
Each day, the sun is working to heat up the Earth, but this process is balanced by the Earth emitting a lot of infrared light into space, cooling it back down. The resulting balance determines the surface and atmospheric temperatures of the planet.
However, some gases, like CO2, absorb some of that outbound infrared light, thus reducing the rate at which the Earth cools back down. (The CO2 also absorbs inbound infrared light, but there’s a lot less of that.)
Increases in temperature due to blocking outbound infrared light is the greenhouse effect. Humans have contributed to this effect, mostly by greatly increasing the amount of CO2 in the atmosphere.
- Light can have many colours.
Some of these colours are invisible to the human eye. Infrared light is an example.
Each day, the sun is working to heat up the Earth, but this process is balanced by the Earth emitting a lot of infrared light into space, cooling it back down. The resulting balance determines the surface and atmospheric temperatures of the planet.
However, some gases, like CO2, absorb some of that outbound infrared light, thus reducing the rate at which the Earth cools back down. (The CO2 also absorbs inbound infrared light, but there’s a lot less of that.)
Increases in temperature due to blocking outbound infrared light is the greenhouse effect. Humans have contributed to this effect, mostly by greatly increasing the amount of CO2 in the atmosphere.
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