The Earth has gone through literally millions of cooling and heating periods over the past 4.5 billions years. I want to live in a healthy environment with clean water and clean air, but it's typical human hubris to think that we know more than we do about complex Earth systems. Most of the science showing warming is based on info on the past 100 to 200 years. That is less than a drop in the ocean of the time that the Earth has existed. The Earth was warmer 1500 years ago than it is now. My point is, don't believe everything you read just because it fits within your politics. We just don't know. That doesn't mean we shouldn't try to reduce pollution and CO2 emissions. In a hundred years, people will look back and laugh at what we thought we knew.