9.3 Air Pollution

Multiple Choice

Which of the following best describes a nonpoint source of pollution?

• A single factory releasing smoke into the air

• A leaking oil tanker in the ocean

• Pollution from many cars on a busy highway

• A broken sewage pipe

Multiple Select

Which of the following are effects of outdoor air pollution?

• Formation of smog

• Increase in acid rain

• Rise in global temperatures

• Decrease in oxygen levels

Fill in the Blanks

Fill in the blank:

is a colorless, odorless gas that is radioactive and can enter homes through cracks in the foundation.