The general tactics used by AGW denialists:
1. Conspiracy
2. Selectivity (cherry-picking)
3. Fake experts
4. Impossible expectations (also known as moving goalposts)
5. General fallacies of logic.
6. Continuing to repeat arguments long after they have been debunked.
7. Distraction (arguing a single narrow subset, ad nauseum)
Only five, not ten. I've seen #2, and reliance on #3, #5 and six in the last few posts. I think we have some of #7, too.
JLL, let's start with your assertion that the earth is actually cooling. Look at this animation from
arborday.org, a gardening organization devoted to trees. The hardiness zones (how far north you can plant a species) have moved north an average of 200 km between 1990 and 2006, clearly visible on the map. This is historically unprecedented. Gardeners world-wide have noticed this. To say the planet is not warming is to deny reality. You are welcome to your own opinion but not to your own facts. Any real scientific debate is about the degree, and which systems absorb or exacerbate it.
In response to my point that denialists must explain why CO2 is not warming the earth as it affects things in a lab, you said the earth is not a lab. If I understand your answer, it is this:
CO2 traps heat in a lab, but the earth is not a lab, therefor CO2 does not trap heat planet wide. That is a faulty syllogism. See #5 above.
Yes, CO2 levels have been much higher in the past, in previous geologic eras hundreds of million of years ago. Sea levels were 100 to 200 feet higher too at those times, most of the continental shelf was flooded. To say CO2 rise is natural is like saying an asteroid heading toward earth is natural. One would still tries to do something about it. Returning to conditions of the early Carboniferous would be a disaster for our species. Fucking up the earth's carbon cycle is not a wise move for a supposedly intelligent species to make.
Edited by maxwatt, 25 January 2011 - 12:03 AM.