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Letter: Global warming?
July 20, 2013, 05:00 AM Letter

Editor,

Earth Day — have your children come home worried that the rainforests are dying, the air is poisoned and the earth is finished? Maybe this will make you feel a little better.

The San Francisco Chronicle in March reported about experiments at the Berkeley National laboratories of reflecting sunlight (heat) away from the earth to mitigate global warming.

Scientists have calculated that white paint on all the flat urban roofs worldwide would reflect enough heat to offset 1.2 gigatons of carbon dioxide each year. This they estimate is equivalent to removing half the world’s cars from the roads.

British scientists calculated in 1990 that increasing the reflectivity of maritime clouds by 10 percent would offset the estimated warming caused by doubling the carbon dioxide concentration of the atmosphere. Methods to make clouds more reflective by seeding the clouds with microparticles of common salt are also being developed.

Think back 100 years, who would have predicted the cellphone, computers and television? While global warming has been absent for the last 17 years, the science community believed as recently as 1977 that we were headed for another ice age. The most devout global warming enthusiasts give us about 100 years for the earth to warm about one to three degrees.

Why destroy our whole economy while we look for other breakthroughs to change the climate or find new totally unknown energy sources. Those sources may be as unknown to us now as the cellphone was 100 years ago. Let’s think, not panic.

Robert Parkhurst

Redwood City

 

 

Tags: warming, years, earth, would, about, clouds,


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