April 7, 2000
Scientists Debate Plan to Combat Global Warming by Dimming Sun
Critics of the space-based scheme, worrying about its cost and side effects, say we should focus on reducing greenhouse gases
As if caught in a Greek drama, Ken Caldeira seems to be pushing the limit on how much irony any one life can sustain.
A former antimilitary activist who helped organize the 1982 "No Nukes" rally in Central Park, Mr. Caldeira went on to graduate school and ended up working as a climate researcher at what he calls a "bomb lab" --
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