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By Science News
Light pollution is a side effect of cheap fossil fuels. As such, we may be closer to the end of this problem than most people think. Electricity is still the best bargain in the civilized world, but blowing it off into the night sky has always been folly. When energy prices reach a high-enough level, streetlights, commercial signage, and private-yard lights will begin to wink out. I eagerly await that day.
Tom Ness
Grants Pass, Ore.
Patrick L. Lilly
Colorado Springs, Colo.