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Climate at "tipping point"
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[QUOTE]Originally posted by Timo: [QB] [QUOTE] I'm not so much worried that we'll destroy the planet. It's survived much worse than a bunch of polluting humans. I'm more worried about the human race surviving the planet. [/QUOTE]The worst doomsday figures for global temperatures in the next few hundred years are basically what Earth was treated to during the last interglacial period, very recent in both geological and biological terms. The Eem was enough to nudge evolution noticeably forward (or backward), but no threat to the existence of life per se. And the existing record of seesawing interglacials and interstadials shows that there is no major danger of runaway positive-feedback phenomena there. Detonating all our nukes at once wouldn't make much of an impact, either. Deliberately detonating them so that radioactive soot covered maximal land areas might have a short-time effect, but it would be a fairly inefficient way to cause mass extinctions. However, blow big enough a hole in the ozone and kill the plankton, and THEN you are definitely speaking trouble... And this is something we just possibly might do without deliberate effort, and take to its fatal conclusion before we ourselves perish. Timo Saloniemi [/QB][/QUOTE]
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