Question

1. what causes acid deposition?

a. methyl chloroform emissions
b. lead emissions
c. carbon monoxide emissions
d. sulfur or nitrogen emissions

Explanation:

Acid deposition (acid rain, snow, etc.) is caused by emissions of sulfur oxides (from sulfur - containing fuels like coal) and nitrogen oxides (from vehicle exhausts, industrial processes). Methyl chloroform emissions are related to ozone depletion, lead emissions are a heavy metal pollution concern, and carbon monoxide is a toxic gas but not a primary cause of acid deposition. So the correct option is d as sulfur or nitrogen emissions (in the form of oxides) lead to acid deposition when they react with water in the atmosphere.

Answer:

d. sulfur or nitrogen emissions