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5. An Ozone (O3) becomes a "bad ozone"? When it
A. becomes unstable.
C. absorbs Ultraviolet (UV) rays
B. stays at the stratosphere.
D. moves down to the ground level.
6. Which of the following effects of global warming is the major cause in the increase
of sea level?
A. Higher amount of rainfall.
B. Melting of glaciers and polar ice caps
C. Bigger and more powerful hurricanes.
D. Increased undersea volcanic eruptions
7. What do we call the gradual rise in the atmospheric temperature due to the increase
in greenhouse gases?
A Climate change
C. Ozone depletion
B. Global warming
D. Greenhouse effect
8. What is the key component of a greenhouse structure?​