The truth is that while climate change is a very real thing, it isn't as dramatic as documentary filmmakers portray it to be. While investment in renewable energy is a positive thing, there has to be a more gradual shift to it, versus the complete cessation of coal mining and fracking that the far left proposes.
Even though it really is a tad more dramatic than you think, this alone would cause mass migration, wide-span food shortages from both extreme weather patters and droughts, less habitable land on earth due to extreme temperatures and rising water levels. You think the Syrian refugees are bad? Imagine the amount of people seeking asylum after their coastal states become flooded, or the African / South American refugees seeking asylum after their crops and livestock die out due to severe weather.
In North America alone, a large portion of our population lives in coastal areas which are definitely going to be threatened by rising sea levels. Estimates have shown that due to over-fishing and the ocean acidification process, a lot of marine habitats will die out, causing even more food shortages.
The "Gradual shift" is an issue because experts are saying we should have begun the gradual shift easily twenty years ago, and have definitely changed their tune from prevention to adaption over the turn of the century. The problem now is that our president elect wants to prop up coal and oil to create jobs. While it will create a lot of jobs, it will also hinder adaption a great deal and make our future life that more miserable.
The left does stuff their pants too much about this, but it is definitely going to be our biggest challenge as a species and a denizen of this planet in the next few generations to come. We cannot keep shunting responsibility off to the later generations to make a profit now, we will effectively doom our species.