6. Light pollution doesnt only affect star visibility.It can harm wildlife too.Its clear that artificial light call attract animals,making them go off course.Theres increasing evidence.For example, that migrating birds use sunsets and sunrises to help find their way, says Sydney Gauthreaus Jr., a scientist at Clemson University in South Carolina.When light occurs at night, he says, it has a very disruptive influence.Sometimes birds fly into lighted towers,high rises,and cables from radio and televisioll towers.Experts estimate that millions of birds die this way every year.
1. When can people see 14000 stars?
A When they have a fairly good telescope.
B When they are in a large city.
C When the night sky is clear of clouds,moonlight and artificial lights.
D When the night sky is without haze and fog.
2.Which of the following statements is NOT related to light pollution?
A A haze of light formed from artificial lights such as streetlights and building lights.
B Lights from different sources in the city stream into space and illuminate the night sky.
C The night sky is illuminated by the lights from big glowing cities in the night.
D Stargazing becomes difficult because there is a layer of haze in the air.
3.Does the writer think growing cities affect astronomerswork?Why does he think so?
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