Can't Agree With That!
Sorry Geoff Gale, but I can't go along with what you say at all:
"All of this stands as solid testimony to the fact that our best predictions are simply guesses - guesses that have been caught up in the heat of politics and power."
Yes, those models are complex, yes there are many variables, no, not all the attempts to understand the problems of global warming neatly overlay in complete consistency with one another. But anyone who has a grasp of human advancement over the last thousand years or so would realise that great steps in knowledge often take time.
One person raises an idea or suggestion, they are refuted and ridiculed, chastised as being out of standing with the commonly accepted wisdom of the day and then over time, more and more people consider what was said, they test it for themselves, they contribute new data or models, and presto, a paradigm shift in thinking takes place.
Thank goodness for people like Copernicus and Galileo and Newton and Einstein and Darwin. Every single one of them was controversial. Why would you think that the emerging science of global warming would be any different? We are only on the cusp of understanding right now. What the world doesn't need is the head-in-sand, 'safe-ignorance' is superior to 'uncertain progress' types.
Anybody with a slight grasp of this science is aghast at the rate of change to ecosystems compared to well understood variations in planetary temperature cycles. Carbon dioxide is a big factor in this of course, amongst many others. A study at offsetting carbon has provided further insights. Just because it produced results that were not at the high end of hopes and expectations doesn't mean the whole thing is rubbish. There's so much more to be understood. Suffice to say, it seems to me that those best predictions are not as you say "wild guesses" but "best predictions"; lets hope they get better quickly. Have a lentil-filled wholemeal bread sandwich on me!