Question

acid deposition effects
reducing what type of emissions will reduce the formation of acid rain?
lead
hydrogen
helium
sulfur dioxide

Explanation:

Acid rain forms primarily when sulfur dioxide (and nitrogen oxides) react with water, oxygen, and other chemicals in the atmosphere to form acidic compounds. Reducing sulfur dioxide emissions directly cuts the precursor chemicals that drive acid rain formation, while lead, hydrogen, and helium do not contribute to acid rain.

Answer:

sulfur dioxide