The sun warms the Earth, but climate change is not caused by the sun. This sort of thing has been studied by scientists. If the sun were suddenly hotter, there are ways to measure that, and it simply hasn’t happened. We are burning fossil fuels. CO2 is a known greenhouse gas. CO2 is at the highest level ever in human existence, and is ramping up constantly. The Earth is at it’s warmest point in thousands of years, and the rate of change is unprecedented in known history. There is no point in that chain of causality that has not been scientifically proven, yet conservatives point at the chain and say “that cannot possibly be true,” yet cannot point to a single valid problem with the overwhelming evidence. Conservatives are less credible on this than on most of their drivel.