1- Based on the title, the purpose of this text is to: (Baseado no título, a proposta do
texto é:)
a) (Explain sun's radiation
b) () Explain earth's temperature
c) () Explain what giobal warming
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Well, basically, the surf's radiation (light waves) comes down to earth. Most
of it enters the atmosphere of the earth's surface, which is what keeps the
earth warm. After the waves hit the surface, they bounce back into space as
infrared radiation. However, a few of the waves hit the atmosphere and come
back down again, and this cycle is what keeps the earth in the ideal
temperature for us to live. This cycle is called the greenhouse effect.