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[科普知识型阅读理解(二)] (限时：25分钟)A Last night's meteor(流星)shower left many people in the community dissatisfied and demanding answers.According to Gabe Rothschild, Emerald Valley's mayor, people gathered in the suburbs of the city, carrying heavy telescopes, expecting to watch the brightly burning meteors passing through the sky.What they found instead was a sky so brightened by the city's lights that it darkened the light of the meteors passing overhead. “My family was so frustrated，” admitted town resident Duane Cosby.“We wanted to make this an unforgettable family outing, but it turned out to be a huge disappointment.”y in the past.They call on people and the government to take measures to fight against it. There is yet a population besides professional and amateur star observers that suffers even more from light pollution. This population consists of birds, bats, frogs，snakes，etc.For example, outdoor lighting severely affects migrating (迁徙的)birds.According to the International DarkSky Association，“100 million birds a year throughout North America die in crashes with lighted buildings and towers.”mal casualties(伤亡) result from the use of artificial lighting.Clearly，people enjoy the benefits of lighting their evenings, but some scientists think it can be harmful for humans，too.They worry that exposure to light while sleeping can increase a person's chances of getting cancer. | 
