Reliable studies show that the earth's temperature is increasing at an unusual and rapid rate.  The question is what to do about it and does it require any action in the first place.  Throughout history there have been spikes in the earth's temperature, followed by drops.  The Paris Accord will cost trillions of dollars over decades and according to an MIT Study published in April 2016 it states that, "if countries upheld their commitments, the pact would slow the global temperature rise to between 0.6 degree and 1.1 degrees Celsius by 2100." And what if the temperatures are falling in 2100?  Do you think anybody can predict with any degree of certainty what will happen 80 years from now?  And do you really believe all 193 countries in the Paris Accord will live up to their pledges when there is no enforcement mechanism and no consequences for non-compliance with the agreement?  This agreement is based on a wink and handshake.