When floating in the air, the tiny lung-damaging particles formed from coal's noxious sulphur emissions reflect sunlight back out into space before it has a chance to heat the surface.
煤炭中有毒的硫所释放的对肺有害的微小粒子漂浮在空中时，可以在地表被照热之前将阳光反射回太空。
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Skylab was the first U. S. space station, and the astronauts would need to know if a fire had started or if noxious gases were loose in the vehicle.