Question

which of these approaches is the best strategy for an overpopulated city whose air is becoming more and more polluted?
a. reduce road construction to dissuade new residents.
b. invest in urban sprawl to better disperse the pollution.
c. reduce air - quality regulations so businesses can grow unimpeded.
d. invest in alternative energy sources to reduce emissions.

Explanation:

Reducing emissions via alternative energy helps air - quality. Other options either don't address pollution or worsen it.

Answer:

D. Invest in alternative energy sources to reduce emissions.