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Thread 'The Methane Effect from Population Explosion'

Thread 'The Methane Effect from Population Explosion'

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old_user53208

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Message 9214 - Posted: 12 Feb 2005, 18:25:45 UTC
Last modified: 12 Feb 2005, 18:26:05 UTC

Methane gas is known to be 20X more efficient than Carbon Dioxide in the Greenhouse effect.

***Does ClimatePrediction.net take into consideration how the worldwide human population explosion add to this Methane gas production?


I'm serious--5.5 billion people and within a few decades, 3 billion more people will be born, making it close to 9 billion people.

That's a lot of Methane gas production (from human feces, and "fart").
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Message 9216 - Posted: 12 Feb 2005, 18:56:48 UTC - in response to Message 9214.  

> Methane gas is known to be 20X more efficient than Carbon Dioxide in the
> Greenhouse effect.
>
> ***Does ClimatePrediction.net take into consideration how the worldwide
> human population explosion add to this Methane gas production?

Hi wang nala,
See <a href="http://climateapps2.oucs.ox.ac.uk/cpdnboinc/forum_thread.php?id=1409">KYOTO &amp; the US (Again)</a> for previous discussion of this.

Andrew
Andrew

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Message 9225 - Posted: 12 Feb 2005, 22:24:41 UTC

Methane production from cattle and sheep is much larger, as is methane from rice paddies.

ClimatePrediction.net does not look at methane separately, the initial experiment looks at the climate sensitivity to CO2. As a first approximation the effects of methane can be added onto that for CO2 and other greenhouse gasses to get a CO2 equivalent.

Methane is quickly oxidised in the atmosphere to CO2 ans so unlike CO2 does not build up, rather its concentration depends on recent emissions. So cut methan production by 50% and the amount of methane in the atmosphere drops by 50% within weeks; cut CO2 production by 50% and the CO2 concentration in the atmosphere keeps on rising, but at a reduced rate. The best estimates are that we need to cut CO2 production by 60-80% to stabalise CO2 in the atmosphere at twice preindustrial levels.
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Message 9277 - Posted: 14 Feb 2005, 1:50:31 UTC

Among the teaching community in the UK it is a recognised fact that certain groups of pupils fart frequently and ostentatiously while most groups never do.

'He farted'.
'No, she farted'.
'No, YOU farted'.
'Oh, Miss, this is gross, please open the window'.

If teachers can socialise the worst groups to the standard of the best, will we have fulfilled our Kyoto obligations? Or will UK methane emissions remain unchanged?


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