"warmers believe that with massive and growing human population it will be possible to significantly slow CO2 buildup in the atmosphere before fossil fuels are exhausted"

In every lifeboat movie there's always one guy who sits off by himself and keeps telling everyone else that there's no hope, all is lost. Let's just drift and die. Usually there's a toady or two who nod in agreement. Meanwhile the others in the boat are manning the oars and fashioning sails in a display of that marvellous human quality of striving mightily against enormous odds. Not all survive, some might. 

Challenges like the ones posed by climate change don't test your character, they reveal it.