atmospheric CO2 levels far above what they have been for 800,000 years...and, if we don't stop what we're doing right now, we're headed for a doubling of that concentration in 80 years..
We know for sure that glaciers will melt...indeed, reports show them melting already...also, established agricultural regions are under stress now...I viewed a report on, I think it was '60 Minutes that showed numerous vineyards in France were suffering from a fungus due to warmer temperatures and their entire crop was ruined...first time ever...while at the same time, new vineyards in England were now producing the exact same grapes...i.e. the climate had shifted north by just enough to make them successful...a small, but telling example of what the future might hold..
In truth, we don't know exactly what the problems will be, or how significant each one could be...but we know they COULD be massive, IF we keep pumping unnaturally high levels of CO2 into the atmosphere...it's not very smart to appreciate that the potential damage could indeed be large and simply not do anything about it.
Also, given that oil and gas supplies are limited, why burn them up when other energy sources can provide the same benefit without producing CO2?...The Democratic Party has been crystal clear on their policy...shift our energy strategy away from FFs to Nuclear and Renewables (where appropriate)...however, in a representative democracy, those things don't get done without legislation, and right now, the GOP has not publicized a strategy...in fact, all the CC deniers are Republicans...so they are impeding any serious progress...personally, I think there are responsible GOPers who would support the same plan as the Dems (e.g. the bi-partisan Infrastructure Bill has significant funding for new GEN-IV reactors), so there is hope...IF responsible legislators are elected and not the Trump followers, who by definition, are irresponsible. (Note: the Dems have their own issues with a fringe element of rabid anti-nukes)
To me, it's an easy call...a) we forestall a major shock to our planet's ecosystem, and b) save our precious FFs for their unique uses for millennia by recycling them instead of destroying them...by switching over to Nuclear and Renewables for heat and transportation.
We need to come together on this to speed the creation of a strategy and plan of action that takes EVERYONE into account...even those in the O&G industry who have helped get our civilization to this point...I thank them for all the good that they've done (in spite of some not-so-good things)...and hope that this transition creates as little pain as possible.