Ozone Layer Depletion

Question 1

Where would you find a cold desert biome?

a)Mojave

b)Sahara

c)Sahel

d)Antarctica

Question 2

About _______ percent of current carbon dioxide emissions are being absorbed into the planet’s oceans.

a)30

b)40

c)50

d)60

Question 3

According to the EPA, the second most significant factor in human-caused global warming and climate change is

a)deforestation.

b)burning of fossil fuels.

c)desertification.

d)species extinction.

Question 4

The current rate of species extinction is conservatively estimated at _______ times greater than the background rate.

a)20 to 200

b)50 to 5,000

c)100 to 1,000

d)300 to 3,000

Question 5

Hydrofluorocarbons (HFCs) have largely replaced chlorofluorocarbons (CFCs) in an effort to reduce ozone layer depletion. What is a drawback to this strategy?

a)HFCs have an unpleasant odor.

b)HFCs are also greenhouse gases.

c)HFCs are more expensive to produce.

d)HFCs are toxic to wildlife.