And, we're off and running on yet another AGW debate.
I picture a car stalled on the railroad tracks, with the people inside debating whether there really is an oncoming train, and whether there is anything that they can do to stop it if there is.
Some of them can hear the train approaching, others apparently can't, so there is the debate over whether there really is a train or not. Some of the passengers who know very well that there is a train say it does not matter, as there have been trains on this track for years anyway. We didn't put the train on the tracks, after all, and we can't stop it.
Others are contending that they must do whatever it takes to stop the train, or there will be a disaster.
It really doesn't matter whether global warming is man caused or not. It is abundantly clear that it is real. What is not clear is that we can actually stop it. Most likely, we can not.
The rational thing to do is research the phenomenon and be as ready as possible for the inevitable.
In other words, quit debating and get the hell out of the car before the train does get here!
Of course, no one expects the human race to do the rational thing. We never have done so before.
Oh, yes, and by all means let's continue to fund space exploration.