In 1987, 36 nations meeting in Montreal, Canada, developed the Montreal Protocol to reduce production of

In 1987, 36 nations meeting in Montreal, Canada, developed the Montreal Protocol to reduce production of

a. carbon dioxide

b. nitrous oxide

c. CFCs

d. toxic wastes

e. halons







Answer: C

If all of the ozone-depleting substances were banned tomorrow, it would take about ___ years for earth to recover to pre-1950 levels.

If all of the ozone-depleting substances were banned tomorrow, it would take about ___ years for earth to recover to pre-1950 levels.

a. 25

b. 50

c. 75

d. 100

e. 125










Answer: D

Chemicals capable of destroying ozone include all of the following, except

Chemicals capable of destroying ozone include all of the following, except

a. chlorofluorocarbons

b. formaldehyde used as a preservative

c. halons in fire extinguishers and crop fumigants

d. carbon tetrachloride used as a solvent

e. methyl bromide used as a fumigant






Answer: B

CFCs take _____ years to reach the stratosphere.

CFCs take _____ years to reach the stratosphere.

a. 1-2

b. 5-10

c. 10-20

d. 20-30

e. 30-50







Answer: C

All of the following chemicals are ozone-eaters, except

All of the following chemicals are ozone-eaters, except

a. methyl bromide

b. PCBs

c. halons

d. methyl chloroform

e. CFCs







Answer: B

Which of the following is the deadliest of skin cancers?

Which of the following is the deadliest of skin cancers?

a. squamous cell

b. basal cell

c. cervical

d. melanoma

e. testicular






Answer: D