The better way to approach the subject is by researching Climate Change. Climate Change is a proved theory that says Earth is on a cycle of warming and cooling due to activities of the Sun; this perfectly explains events in the past. Global Warming simply describes the warming part; but the theory that humans cause it is entirely wrong.

If your sister wants to have the best presentation she should only present the known facts: did you know that scientists have recently admitted that we are going through a NATURAL warming cycle, and the temperatures on Mars and Venus are also rising. This suggests humans are not causing any imbalance in the world and the government has been, in effect, lying to the world.

It’s always best to stick with the facts, not the theories!

Sorry if this contradicts what you believe, but the world is being brainwashed by the false theory of Global warming and I think people should be more aware of the truth. If your sister mentions that there are arguments for AND against the theory of Global Warming, she might even get a higher grade for helping her fellow students make their own decisions.

Good luck to her and I hope she does well!