Gases released during the use of fossil fuels causes global warming.
Global warming is a global environmental problem.
Gases released during the use of fossil fuels cause a global environmental problem.
gases released during the use of fossil fuels cause a what?
  * atmospheric depletion
  * global environmental problem
  * Plant growth is reduced
  * global finances
  * depress neuronal excitability
  * DNA damage and mutations
  * global food increase
  * global water stability