Research Papers / pro (natural), con (man-made), laws created - Global Warming Research [2]

Hi,

I have to write a research paper on global warming. The topic includes pro (natural), con (man-made), laws created because of global warming, and how it affects businesses. I have never written a research paper and I don't know how to start and what to do. Let alone write a thesis statement. Can anyone help me out and provide some guidance please?