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- Path: sparky!uunet!stanford.edu!agate!darkstar.UCSC.EDU!darkstar!steinly
- From: steinly@topaz.ucsc.edu (Steinn Sigurdsson)
- Newsgroups: sci.environment
- Subject: Re: --Warming Threat to Economy
- Date: 10 Sep 92 15:14:31
- Organization: Lick Observatory/UCO
- Lines: 56
- Message-ID: <STEINLY.92Sep10151431@topaz.ucsc.edu>
- References: <1466601760@igc.apc.org> <STEINLY.92Sep10140417@topaz.ucsc.edu>
- <1992Sep10.211840.14872@vexcel.com>
- NNTP-Posting-Host: topaz.ucsc.edu
- In-reply-to: dean@vexcel.com's message of Thu, 10 Sep 1992 21:18:40 GMT
-
- In article <1992Sep10.211840.14872@vexcel.com> dean@vexcel.com (Dean Alaska) writes:
-
-
- In article <STEINLY.92Sep10140417@topaz.ucsc.edu> steinly@topaz.ucsc.edu (Steinn Sigurdsson) writes:
- >In article <1466601760@igc.apc.org> tgray@igc.apc.org (Tom Gray) writes:
-
- > According to IIE's William Cline, global warming by a predicted 2.5
- > degrees Celsius (C) by the year 2050 will reduce U.S. gross
- > domestic product (GDP) by about one percent, or $60 billion.
- > However, Cline noted, global warming is cumulative and irreversible
- > and is projected to reach 5.7 degrees C by the year 2100 and 10-18
- > degrees C by 2300. The impact of the latter figure would be a drop
- > of six to 20 percent of GDP.
-
- >Ignoring the ludicrous 10-18 K warming figure (what _did_ they
- >do to get that? Do a linear extrapolation of 2.5K/50years and add
- >nominal error bars? ) it could be noted that 1% variations in GDP
- >are economic noise, and US growth rates are 2-3% per year long term
- >average. Anyway, isn't the whole problem excess economic growth
- >by the "North"? ;-)
-
- I would assume they used an exponential growth extrapolation, which
- would be more reasonable than linear _assuming_ no actions are
- taken to limit CO2 and equivalents.
-
- Actually, the numbers are precisely the linear extrapolation that
- I postulated - unless someone provides a citation I think it can
- be assumed that is precisely what was done - IPCC figures it ain't.
-
- The growth that some
- environmentalists (ala Club of Rome) complain about is not GNP
- (money) growth, it is the growth in _physical_ throughput, which
- may or may not correlate to GNP growth in the future.
-
- Sure, just switch to a paperless service economy - you can
- generate almost arbitary growth by paying enough lawyers and ad agents ;-)
-
- And while a
- 1% variation in economic growth for 1 year might be noise, it
- wouldn't be when accumulated over many years. In any case,
- if the temp increased by over 10 degrees C, a decreasing GDP might
- not be our most pressing concern.
-
- If they mean a 1% drag _per_year_ than the economic loss is
- much higher than $60G - more like $3T - and it's still economic noise,
- growth fluctuates by 2-4% per year for completely mystifying reasons
- - BTW I'd WAG $3T as being equivalent to replacing Chicago over the
- next 50 years - again minor in national economic terms.
- I do agree though that a 10-18K warming in 300 years would
- make GDP considerations somewhat irrelevant.
-
- * Steinn Sigurdsson Lick Observatory *
- * steinly@lick.ucsc.edu "standard disclaimer" *
- * If you ever have to go to Shoeburyness *
- * Take the A-road, the ok road, that's the best! *
- * Go motoring on The A13! - BB 1983 *
-