Your research is developing but you need to clarify your thesis and check the highlighted parts. THESIS: You need to improve your thesis. Check the highlighted part(s). You're right to explain the environmental effects of forest fires briefly in the thesis, but the hole in the ozone layer does *not* cause global warming.  Also, you don't need to focus on Australia only - there are forest fires also in other countries such as Brazil. 

IMPROVED THESIS: government and people's efforts should focus on toxic gases as they contribute to the hole of the ozone layer which leads to global warming, and negatively impact the ecosystem 

government and people's efforts should focus on toxic gases which lead to global warming, and negatively impact the ecosystem.