標準環境・自然科学語句空所補充

Cooling Cities with Trees

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Summers in big cities are getting hotter every year. Concrete buildings and roads absorb heat during the day and release it at night, so the air stays warm. To deal with this, the city of Greenport decided to ( 1 ). Workers planted thousands of trees along streets and in empty lots. The results were clear. Areas with many trees were several degrees cooler than areas without them. ( 2 ), the trees gave shade to people walking outside and homes to birds and insects. Residents said the streets felt more pleasant. The project was not without challenges. Young trees need water and care, ( 3 ) the city had to train volunteers to look after them. Still, officials believe the effort is worth it, and other cities are now studying Greenport's example.

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