A lot of marginal farmland in the United States has been returned to
forest land.
It's the same throughout much of New England -- lots of woods, but it's
all "second growth" because it all was farmland a century ago. It was
terrible farmland, but in the absence of the Interstate system and ch
Howdy Jeff,
Same here in Texas. Before 1870 range prairie grass fires could sweep
across whole counties that acted to prevent forests from gaining a foot
hold.
Interesting arguments for and against "greenhouse" effect. Al Gore and Rush
Limburger cheese et al should both be proud of their abili
photos of the Berks county Pennsylvania area of 1900 vintage show surprising
areas of cultivation that are now forest.
Jeff
-Original Message-
From: Jed Rothwell [mailto:[EMAIL PROTECTED]
Sent: Friday, April 25, 2008 1:23 PM
To: vortex-L@eskimo.com
Subject: Re: [Vo]:How many volcanoes would
In reply to Jed Rothwell's message of Fri, 25 Apr 2008 18:19:31 -0400:
Hi,
[snip]
>Robin van Spaandonk wrote:
>
>> >(By the
>> >way, decreasing levels of free oxygen have not been examined, and
>> >recent evidence shows this, too, is a threat.)
>>[snip]
>>At 400 quad / year energy use, and assumin
Robin van Spaandonk wrote:
>(By the
>way, decreasing levels of free oxygen have not been examined, and
>recent evidence shows this, too, is a threat.)
[snip]
At 400 quad / year energy use, and assuming that all the energy is
derived from
carbon combustion (e.g. anthracite), and further assuming
In reply to Jed Rothwell's message of Fri, 25 Apr 2008 13:22:59 -0400:
Hi,
[snip]
>If volcanoes added far more CO2 to
>the mix then we do, than plants would have a negligible effect and
>the atmosphere and there would be practically no free oxygen. (By the
>way, decreasing levels of free oxygen
OrionWorks wrote:
Assuming we could magically, starting tomorrow, stop
emitting all forms of CO2 as a result of our technology:
How many active volcanoes would it take to produce
an equivalent amount of CO2 that humanity currently
produces ...
thomas malloy wrote:
Compared to the volcanoes, al
Further to my previous comment - there seems to have been some black
propaganda put about that the output of volcanoes dwarfs what humans
produce - and we are invited by this "fact" to imagine that nature's effects
are much larger than humans and therefore all the talk of manmade global
warming
thomas malloy wrote:
Compared to the volcanoes, all 6,000,000,000 of us are the
equivalent of a pimple on an elephant's rear end.
That is incorrect, as shown by the stats Nick Palmer found. It is
also obviously wrong because in North America, we burn roughly twice
as much fossil fuel as all
OrionWorks wrote:
Assuming we could magically, starting tomorrow, stop emitting all
forms of CO2 as a result of our technology:
How many active volcanoes would it take to produce an equivalent
amount of CO2 that humanity currently produces and/or is indirectly
Compared to the volcanoes, al
I don't know how many volcanoes it would take but the global total CO2
emissions of active volcanoes is about 1/150th of what humans are doing.
see this site
http://gristmill.grist.org/story/2006/12/17/223957/72
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