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problem caused by increased levels of CFC's in the atmosphere; living things are exposed to more UV radiation

• global warming

• thermal pollution

• greenhouse effect

• ozone depletion

Which of the following issues is the cause of the other environmental impacts caused by humans?

• pollution
• human population growth
• climate change
• habitat destruction 

Which of the following results when levels of CO₂ in the atmosphere increase due to the burning of fossil fuels?

• ecological succession

• acid rain

• ozone depletion

• global warming

Fishermen have harvested certain fish to the point where the population of that fish is decreasing. This level of direct harvesting could cause

• ecosystems to be improved for future generations
• ecosystems to be severely damaged
• the restoration of environmental stability
• all other fish species to increase in number

Modern lifestyles have led to increased demands for a wide variety of consumable products. The packaging of these products has caused environmental problems associated with

• food web contamination

• urbanization

• ozone depletion

• solid waste disposal

In some areas, foresters plant one tree for every tree they cut. This activity is an example of

• lack of management of nonrenewable resource

• a good conservation practice for renewable resources

• a good conservation practice for nonrenewable resources

• lack of concern for renewable natural resources

In some areas, foresters plant one tree for every tree they cut. This activity is an example of

• lack of management of nonrenewable resource

• a good conservation practice for renewable resources

• a good conservation practice for nonrenewable resources

• lack of concern for renewable natural resources

Fertilizers used to improve lawns and gardens may interfere with the equilibrium of an ecosystem because they

• cause mutations in all plants

• cannot be absorbed by roots

• can be carried into local water supplies

• cause atmospheric pollution