Let me applaud you on getting this correct because some still deny it is even occurring.The fact of Global Warming isn't really in question.
But I won't let you get away with this because it is simply incorrect. The vast majority of the scientific community that has studied this has reached the conclusion that it is related to human activity. Even George W. Bush finally admitted before the start of the G8 summit last year that global warming was linked to human activity.There is extremely good evidence that the process is substantially if not entirely natural.
Science, not just climate science, is overall a very conservative discipline. For the majority of the scientific community to have arrived at the conclusion that our planet is warming related to anthropogenic activity is not simply because a couple of scientists or even hundreds or thousands of scientists have said so. It is because an overwhelming amount of evidence from every corner of the globe has led them to this conclusion.
Yes, there are still some climate scientists, by far a small minority, that still claim that either global warming is not occurring, or if so, it is not related to human activity. That's ok, that's part of the scientific process, and everybody has a different understanding of reasonable doubt. But as evidence continues to pour in day after day from around the globe, I think eventually even that small majority will have a change of opinion.
Always draw your curves, then plot your reading.