Bottomfish:

So if the warming is a problem, what is causing it? Why are you so sure the cause is (exclusively) increasing CO2? Lichtenstein does not attempt to answer. The global warming alarmists don't, either.

Except, of course, for hundreds of pages in the IPCC report, summarizing hundreds of individual scientific publications, all because the simple chain of effects: we burn enormous truly amounts of carbon. burning carbon produces carbon dioxide. carbon dioxide in the atmosphere is rising. carbon dioxide absorbs infrared radiation. absorbing infrared radiation raises the temperature, which has been proved over and over again each individual step at a time and overall, is unacceptable. Is there any other field of science where such a well proved model is rejected on the grounds that 'you haven't proved that it might not be something else we don't know about?'