Unit 7 Posttest Review 3

Which of the following has NOT contributed to the pollution of the Great Lakes?

• dumping of industrial waste

• surface water runoff

• loss of wildlife

• acid rain

Why is it difficult for Canada to effectively address the problem of acid rain?

• Canada's cities are surrounded by mountains that trap polluted air.

• Canada uses hydropower to produce most of the country's electricity.

• Commercial farming makes up the largest portion of Canada's economy.

• Much of Canada's acid rain is caused by pollution from the United States.

What are TWO major causes of acid rain in Canada?

• desertification

• industrial emissions

• nuclear power plants

• vehicle exhaust

• wind farms

Which of the following statements about environmental issues in Canada is correct?

• The mining industry has little effect on deforestation in Canada.

• Canadian timber is often harvested faster than replacement trees can grow.

  
  

• Canada will always have plenty of timber because it is a renewable resource.

• The boreal forest of Canada is large enough that clear-cutting will have little effect on wildlife.