But astronomers, environmentalists and groups like the International Dark-Sky Association argue that the dome of glaring light over cities and towns from mercury-vapor bulbs and other security lights is a form of pollution.

 
  • 但是天文學(xué)家、環(huán)保主義者以及國際黑暗天空協(xié)會(huì )等團體認為,水銀燈和其他出于安全目的安裝的燈具發(fā)出的籠罩在城市上空的耀眼光芒是一種污染。
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