Science and the Bible support that there was once a great worldwide flood. That would suggest it was hot enough the ice caps had melted. The Ice Age tells us the Earth cooled back down. So the climate has always changed. Are we a catalyst speeding up the process? Possibly. But we are not the cause of the process. Could we potentially slow the process? Maybe. But we also continually fight against nature. We've continually over-populated the Earth. And as the Earth responds in an attempt to combat that overpopulation, we find new ways to survive. We, as humans, talk about conservation in regards to everything but ourselves. So if we are speeding up a climate change, the most likely result is our own extinction. We won't destroy the planet, just ourselves.