It's not a bait and switch at all. It was a direct response to your claim that we should weigh the alternative of reducing warming in ways other than CO2 reduction......Because that misses the point that increasing atmospheric CO2 has other negative impacts that go beyond average temperature. If that were not the case, then you would be right that we could apply a more traditional cost/benefit calculus to the correct course of action.
I understand that the point goes beyond global warming, but that's also why the term "climate change" is preferable. The ocean is just as important to our climate as the air we breathe.
I think you may be confused on the order of posts, and what was in response to what, but that is inconsequential. It IS a bait and switch, as is the change from "Global Warming" to "Climate Change". When one argument starts to fall apart, or evidence comes to light that refutes it (facts are very pesky to people with agendas), shift to an argument that was never central to the debate (acidification of the oceans!), or change the name ("climate change") so one can broaden one's definition of supporting evidence. Where as "climate" has always been taken to mean weather patterns and such, now with a single word change you're claiming ocean PH balance is now included!?! Seems like bait and switch to me, and the bait is smelling mighty stinky
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Oh, and has already been pointed out, man is not the major source of CO2, and CO2 is a mere fraction of the so-called greenhouse gases (and is by far not the most important). And again I'll point out that the heat-trapping properties of CO2 are not linear as levels go up. In otherwords, doubling of CO2 causes x amount of additional heat to be trapped; doubling it again causes x/2 additional heat, and so on. This may be one reason why CO2 has continued to climb in the last 10 years, but global temperatures have not. Just a thought.
By the way, I've heard pretty much nothing in the media about the coming oceanic acidification disaster; even today, the claims of armegedon still focus on higher temperatures and their associated effects (floods, drought, famine, rising sea levels, to name but a few of the claims). I don't believe even Al Gore's propaganda "fictu-mentary" mentioned that as a danger, even in passing (could be wrong, of course). I do suspect that if global temperatures remain stagnent or start to decline, someone will trot out acidification of the oceans as the "real" danger of CO2 ("We never said warming was the main danger, honest!"), to keep that horse twitching and justify draconian and global measures to curb them. Oh, and what is the tipping point, CO2-level wise, where we cause catastrophic damage to marine life due to acidification? How many PPM? Based on what models? As long as we're shifting the focus from "warming" to "acidification", I'd like to know.