Nearly two-thirds of the world's population live under night skies polluted by light, according to the first atlas of the world's artificial night-sky brightness, published by Italian and U.S. researchers in 2001. ... Environmentalists say light pollution has been growing by about ten per cent a year since 1960s, and only recently have serious efforts begun to try to control it.
――東邦大学 理学部(2月6日実施)――2005年