Both sides need to grow up, and the climate debate needs to be shifted to reasonable grounds. In short, Republicans need to stop denying that climate change is real, and liberals need to admit that they don’t have all the answers.
There are things we know with a good level of certainty, and conservatives should grant these:
In general, the Earth’s atmosphere is getting warmer. Of course, there is no single temperature of the atmosphere. Even speaking of an “average” is a bit tricky, because our temperature stations are irregularly spaced, and of varied reliability and longevity. But the aggregate of the data shows a general upward trend in temperatures on Earth.