Question

Writing a paper about contributors to Global Warming

What should be my 3 main points?

Answer 1

You will need to do some research. Figure out what contributes, and pick three to focus on.

Answer 2

A good place to start would be the EPA (Environmental Protection Agency) who have a web section dedicated to Climate Change which also talks about Global Warming. You might find what you need by exploring it here:

http://www.epa.gov/climatechange/

And here's a page that also talks about Global Warming in the same place to help you distinguish which is which:

http://www.epa.gov/climatechange/basics/