As water vapor rises, it cools. As ________ occurs, clouds are formed.

Lower altitudes experience ________ air pressure to/than higher altitudes.

Which color absorbs more light energy from the sun and converts it to the most heat?

Which 2 sources of pollution are natural and release CO₂ into the air? (Pick 2)

Which term describes air pollutants that are already dangerous when they enter the air?

Which term describes air pollutants that result from a chemical reaction?

What is the source of most air pollution?

Particles in smoke, soot, and coal dust are all examples of _______.

Overgrazing or overfarming can loosen soil and make dust from _______ worse.

Since being passed in 1963, the ________ has resulted in a significant reduction in air pollutants.

Chlorofluorocarbons have contributed most to which issue?

Since being signed in 1986, the ________ has resulted in a significant reduction in CFC use and production.

The hole in the ozone layer results in an increase in _______.