Word: microwatts
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...principle behind one of the most innovative forms of energy-scavenging: rain-harvesting. Researchers led by Jean-Jacques Chaillout at France's Atomic Energy Commission found that a 25-micrometer-thick strip of piezoelectric material (the diameter of a thin strand of human hair) could produce about 1 microwatt per raindrop. That's barely noticeable, but it could be enough to power environmental sensors, especially in areas where condensation is constant--like the inside of a nuclear power plant's cooling towers. "When you add up all the materials and costs in powering, battery production and charging you save with...
...unconvinced that there is any real danger. Only recently a study by the National Academy of Sciences found that naval radar operators died no younger than their peers in other jobs. The Environmental Protection Agency points out that 98% of the U.S. population is exposed to less than one microwatt of microwave radiation at any one time. Says State Department Biologist Herbert Pollack: "The 'zapping of America' is just a sensationalist charge." Perhaps so, but in an era of microwaves, their use obviously requires continued research and education...
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