Fact 1: Gases from burning coal and oil dissolving in water in the atmosphere causes acid rain.

Fact 2: An acid is defined as a compound which can donate a proton .

Given the two facts above, answer the question "What comes from burning coal and oil dissolving in water in the atmosphere?" with the following options: 
- Plant growth is reduced
 - A transportation fuel
 - Generating heat
 - harmful substances
 - DNA damage and mutations
 - A compound that donates proton
 - ozone depletion
 - Mutagenic chemicals


 

      A compound that donates proton   