1. What is one of the largest sources of air pollution? forest fires

volcanoes

automobile emissions

burning coal

2. Which option describes how CFCpollutants harm the environment?

CFCsfrom cleaning and cooling materials mix with water molecules and cause acid rain.

CFCsfrom auto emissions enter rivers through runoff and waste water, harming Earth’s fresh water resources.

CFCsfrom cleaning and cooling materials combine with other molecules in the air, harming Earth’s protective ozone layer.

CFCsfrom non-aerosol spray cans move directly to the lower atmosphere, causing solar radiation that harms Earth’s resources.

3. What is an effect of acid rain on human health?

loss of hearing

respiratory diseases

cancer

stress

4. Which option describes human sources of water pollution?

CFCs and auto emissions

technology and fossil fuels

melting snow and ice

untreated sewage and fertilizers

5. What is an effect of landfills on the soil and water?
Landfills lead to soil erosion.

Landfills cause no effects on soil and land.

Landfills produce greenhouse gases.

Chemicals from landfills leach into the soil and water.