HUMAN CAUSED climate change is/has been, a left wing political hoax. 
The Paris agreement was just another way to extort money for the world socialists from the USA.
Since Denver has never been able to clean the air in its own city, how could it participate in something so huge as fixing 'climate change'?
Left-wing politics will never change, greed based, always destructive!
Hick is simply looking for a national stage, and will do whatever to move on.