In addition, greenhouse gases have caused a warming effect on the earth's climate.
The greenhouse gases are water vapor, carbon dioxide, methane, and ozone.
21. What are the two general kinds of pollution enumerated in the text?
a. air and noise b.light and radiation c.obvious and less obvious c.soil and water
22. How many subtypes of pollution are mentioned in the text?
a. four
b.five
C.six
d.seven
23.People who live near airports experience________
pollution.
a. greenhouse
b. light
c. soil
d. radioactive
24.Burning of leaves and other wastes contribute to_______
pollution
b. noise
d. water
c. soil
a. air
25.Using toxic materials to catch fish is an example of________
pollution.
b. noise
d. water
a. air
c. soil​