I think most people agree that science shows the earth has gone through periods of time both hotter and colder than our current time. I think where the debate is lies in just how much on an impact man makes on these changes, and what we can (or cannot) do to keep the earth in it's current state.
Below is derived from something I read, that I felt helped explain my thoughts on the matter....
Truth Matters.
it is obvious that the Earth, a living system, is constantly heating or cooling. We should not deny that fact.
People Matter.
Even if we can establish beyond doubt that global warming is real and it is caused by humans, that does not mean it is bad and that we should cripple ourselves or our posterity in devising “solutions” to it. Our goal should be human flourishing. Unfortunately, some think human destruction is the solution to global warming. “Population management” is the euphemistic phrase for the advocacy of mass abortion, euthanasia, and other forms of population control aimed at reducing human population to numbers not seen in centuries.
Compassion Matters
Whether we see many more storms or fewer storms, whether they are the result of global warming or cyclical climatological events, one thing is certain: They will continue to produce victims who will need our help. Compassionate action relieves the suffering of victims and we should all help where and how we can.