Fact 1: Gases released during the use of fossil fuels causes global warming.

Fact 2: Global warming is a global environmental problem.

Given the two facts above, answer the question "gases released during the use of fossil fuels cause a what?" with the following options: 
- atmospheric depletion
 - global environmental problem
 - Plant growth is reduced
 - global finances
 - depress neuronal excitability
 - DNA damage and mutations
 - global food increase
 - global water stability


 

  global environmental problem       