Core (Universal)第 1 / 240 题
Why is the stratospheric ozone layer important to life on Earth?
a.It produces the oxygen that people breathe
b.It absorbs harmful ultraviolet (UV) radiation from the sun
c.It reflects radio signals back to the surface
d.It traps heat and keeps the planet warm
解析
The ozone layer in the stratosphere absorbs most of the sun's harmful ultraviolet (UV) radiation, which protects humans, animals, and plants. It does not warm the planet like greenhouse gases do, produce breathable oxygen, or reflect radio signals. Protecting this layer is the main reason Section 608 limits the release of ozone-depleting refrigerants.
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