Question

Which of these describes a way in which air pollution has been reduced?

• A. Raising cattle for food
• B. Using fossil fuels
• C. Using unleaded gasoline
• D. Releasing ozone into the atmosphere
• E. Releasing greenhouse gases

Answer 1

The correct option is C Using unleaded gasoline

A. Raising cattle for food has no relation with air pollution.

B. Fossil fuels increase air pollution as their burning releases hydrocarbons in the air.

C. Unleaded gasoline was prepared by removing lead from gasoline. Gasoline is a commonly used fuel for vehicles but it causes air pollution as it releases nitrogen oxides in the air. Unleaded gasoline doesn't release such harmful gases.

D. Releasing ozone into the atmosphere is not related to air pollution. Instead, it will reduce ozone layer depletion.

E. Releasing greenhouse gases will cause global warming and increase the air pollution also.

Hence, air pollution has been reduced by using unleaded gasoline.

So, the correct answer is 'Gasoline'.