Human Caused Climate Change is the single biggest threat facing us today. 
Exxon knew of this in their own study over 40 years ago. The damage already done to our planet by the Republican Party in halting or hindering attempts to reduce carbon emissions is incalculable. Big Oil and thier bought and paid for politicians have knowingly committed crimes against humanity for decades and should be held accountable for what they have already done. But instead they are now in control of the most powerful and influential country on earth. The damage the Big Oil Russian Republican Party is capable of doing controlling Congress, the Courts as well as the Presidency is beyond comprehension. Our only hope is that the Global Community will keep the USA in check. 

Exxon Knew about Climate Change Almost 40 Years Ago - Scientific American
https://www.scientificamerican.com/article/exxon-knew-about-climate-change-almost-40-years-ago/