On Sun, May 3, 2009 at 3:22 PM, John Thornton <jthorn65 at sbcglobal.net>wrote:
> James Heartfield wrote:
>
>> In other words, it is a crap methodology, that is full of holes.
>>
>
>
> In the US roughly one-third of all agriculture is irrigated from the
> Ogallala aquifer.
> We are currently using this water at a rate far higher than the aquifers
> replenishment rate.
> This means it will run dry. This means the water source will no longer be
> available.
> It has about 25 years left at current rates.
> We have temporarily exceeded the long term irrigation capability of the
> Midwest.
> Once you remove the aquifer as a source of irrigation water you remove that
> one-third of current agricultural output as well.
> It's a pretty easy concept to understand once you remove ideological
> blinders.
> Maybe you can find a cost effective alternate water source, maybe you
> can't.
> We are "spending" the planets "principal" and you can't do that forever.
> Once the principal is gone the lifestyle it sustained is no longer
> unsustainable.
>
> John Thornton
>
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