It's increasingly common in today's society to use outdoor lighting around our homes and businesses to draw attention to a sign， provide security and allow people to be more active at night． However， according to a recent article at DiscoveryNews．com， scientists suggest that light pollution is a growing problem for wildlife． Migratory（迁移的） birds are getting confused and flying into the sides of skyscrapers． Nocturnal（夜间活动的）creatures have to hurry when they're out looking for dinner（while becoming easier to be dinner when they're out looking for food）． And newborn sea turtles are crawling inland rather than heading out to sea．
Travis Longcore， director of the Californiabased Urban Wildlands Group said， "We've turned many places of the globe into permanent full moon， or more．"And this "permanent full moon" effect is causing animals that depend on the darkness of night for their survival to lose all sense of direction．
Instead of totally pulling the plug on lights， there are a few ways we can cut down on the amount of nightly light pollution we help create． Some communities and cities have passed Dark Sky laws to preserve and protect the nighttime environment through quality outdoor lighting．
Chicago， for example， became the first city in the United States to dim（变暗） their tall buildings at night during spring and fall bird migrations． The Windy City does this for nearly five months a year， in an effort to help save birds" lives．
And several lighting manufacturers offer darksky friendly lights that are specifically designed to cut down outward and upward lights． In addition， reducing wasted light saves money， energy and resources， which in turn reduces air pollution and carbon dioxide emissions caused by energy production．



How can light pollution affect migratory birds？ ______

A. They will easily get lost on their way of migration．
B. They will change their living habits．
C. They cannot find food any more．
D. They cannot fly over tall buildings．

What happens to nocturnal creatures because of light pollution？ ______

A. They go away from the cities．
B. They go into people's homes to find food．
C. They can't find the food they need．
D. They are more likely to be eaten by other creatures．

Chicago will dim their tall buildings at night to ______ ．

A. make people sleep well
B. prevent birds from migration
C. make the night more beautiful
D. save birds" lives

What Travis Longcore says in the second paragraph suggests that ______ ．

A. the full moon is the main cause of light pollution
B. the effect of the "permanent full moon"threatens animals" survival
C. the full moon has done great harm to animals
D. the effect of the "permanent full noon" is still not clear

We can infer from the last paragraph that ______ ．

A. darksky friendly lights are not effective enough
B. light pollution can worsen air pollution
C. air pollution will be more serious during the day
D. darksky friendly lights are designed for birds