1 ) 

Sulfur dioxide emissions → reaction with water vapor → formation of sulfuric acid → acid rain → leaching minerals from soil → improved plant growth

2 ) 

Sulfur dioxide emissions → reaction with water vapor → formation of sulfuric acid → acid rain → leaching minerals from soil → stunted plant growth

3 ) 

Nitrogen oxide emissions → reaction with oxygen → formation of nitric acid → acid rain → adding minerals to soil → enhanced plant growth

4 ) 

Nitrogen oxide emissions → reaction with oxygen → formation of nitric acid → acid rain → adding minerals to soil → reduced soil acidity