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"Heathrow and Gatwick airports: Ministers mull rail link"(twixt
On Wed, 12 Oct 2011 18:18:52 +0100, Guy Gorton wrote:
Not a comment on the original post but just a little contribution to the overall thread on global warming/pollution/whatever. I don't think a word has been said about the contribution of volcanoes to all the nasties in the atmosphere - as I understand it, man's pollution is but a fraction of what the world's volcanoes spew out. Or have I been misinformed? Pretty much, yes. You have been misinformed. Individual large eruptions can spew out a lot of CO2, but they're transient. They don't keep on pumping it out day after day, month after month, year after year. Globally, it's a small (going on insigificant) effect. This hasn't always been true in geological time, of course - vulcanism may have played a critical role in driving climate change at the end of the Permian, for example. Sample reference at: http://www.eoearth.org/article/Carbon_dioxide but the numbers look consistent with other refereed/reputable sources I've seen. -- Speaking for myself, and no-one but myself |
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"Heathrow and Gatwick airports: Ministers mull rail link"
On Wed, 12 Oct 2011 17:55:47 +0000 (UTC)
Andy Breen wrote: http://www.eoearth.org/article/Carbon_dioxide but the numbers look consistent with other refereed/reputable sources I've seen. Another good link: http://www.newscientist.com/article/...2-emissions-ar e-too-tiny-to-matter.html B2003 |
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