Really, research aside, why the fight against this notion? It is pretty clear that things are warming up, and that humans have had "some" effect.
Whether you have trust in the research that has been done to this point or not the above is pretty indesputable fact. We have groups like the EPA, NASA and NOAA saying that this issue is real. These aren't environmental wackos!
Scientists who fudge the numbers and establish theories that don't stand up to scrutiny following publication have much less chance of keeping their job. These NASA, EPA and NOAA guys probably want to keep working. Publishing bugus theories won't help.
So lets assume that the threat is real and it will affect future generations. Now what?
I think we should care even if its just our Grandchildren we will be assisting.