Motor vehicles produce more air pollution than any other single human activity.
one full commuter bus can mean less cars going through your neighbourhood.

a) 10
b) 20
c) 40
d) 60

Which of the following is an environmental cost of agriculture? a. agronomyb. cash cropsc. pollutiond. crop rotation

Which of the following is not a consequence of urban sprawl? increased racial tensions the relocation of industry to the inner cities higher poverty rates in the inner cities higher unemployment rates in the inner cities population losses to inner cities

Which mountain range separates georgia from russia? a. ural mountains b. carpathian mountains c. caucasus mountains d. siberia mountains