1.When the air is very dirty we usually say it is ______.
A) nasty
B) polluted
C) not clean
2.The thing which pollutes the air and soil is _______.
A) fertilizer
B) pollutant
C) pollution
3. We should protect ______.
A) The environment
B) pollutants
C) soil
4. Ecological problems can be _____.
A) solved by people
B) done
C) thought by business.
5. A person who doesn't eat meat is _____.
A) a strong person
B) a vegetarian
C) a person who hates animals.
