Don't Be Evil wrote:
wrote:
If the sun warms the Earth too dangerously, the time may come to
draw the shade. The "shade" would be a layer of pollution
deliberately spewed into the atmosphere to help cool the
planet. This over-the-top idea comes from prominent scientists,
among them a Nobel laureate.

This weekend, NASA's Ames Research Center in Moffett Field,
Calif., hosts a closed-door, high-level workshop on the global
haze proposal and other "geoengineering" ideas for fending off
climate change.

Complete article he

http://sfgate.com/cgi-bin/article.cgi?f=/n/a/2006/11/16/international/i112951S42.DTL

It would be terrible if saving New York, Miami, Rio De Janeiro, Los
Angeles, Tokyo, Hong Kong, Sidney, Cape Town, Hamburg, and London
interferred with amateur astronomy.

Maybe it's payback time; those cities you cited are among the worst
light-polluters interfering with amateur astronomy.

:-)

The proposal cited in the article (above) however would also affect
professional
observatories. If the atmosphere itself is dimmed with pollutants, ALL
are affected.

Seriously, though, it would seem that, perhaps, mylar (or carbon nano
flats or
something else) sheeting could be placed in orbit (near SOHO?) to act
as a
shield when/if necessary to eliminate the need to muck with Earth's
atmosphere.