"It is well established that the climate is changing - warming. I believe it is also fairly well established that human activities are exacerbating this global warming trend. "

I don't believe this last part is true. I think it's reasonable to suspect that human activity could be exacerbating the current global warming trend. But IF it was "fairly well established that human activity was exacerbating global warming", it could said with some confidence how much human activity has added to global temperature [or global sea level rise]. I don't think anyone [who is serious] is confident of this- they might venture say a 1/2 degree temperature increase over the last Century or a few centimeters in sea level increase over last century due to human activity. But I think it's a fairly dubious claim.
And next of course you need to determine what human activity is mostly responsible for this questionably measureable increase- is it mostly large scale land use, methane, CO2, or something else.

BUT I am in favor of ideas that would reduce CO2 emission- such as increasing the number nuclear power plant in the US- if we could just up to parity with say Japan (nevermind France) I think that would be good.