The greenhouse effect occurs when the atmospere absorbs
wavelenghts emitted by Earth. Some of the energy travels back to
Earth and is absorbed. The three most common greenhouse gases
are water vapor, carbon dioxide, and methane. These gases come
from the atmosphere naturally. Without the greeenhouse effect,
it would be very cold on Earth. The greenhouse effect heats the lower
atmosphere. Because of this I think that the greenhouse effect is very, very good.
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