Some older cities dont have space for a big urban forest, but planting trees on the streets makes the city better. Scientists found that commuters (通勤人员) feel more relaxed when they can see trees. Trees are even good for business. ___A____ (50) In the future, urban forests will become even more important as our cities grow bigger. In the megacities(超大城市) of tomorrow, people will need more green space to live a comfortable life. Planting trees today will make our lives better in the future.
A.People spend more time at shopping centers that have trees
B.In hot countries,urban forests are cool places for walking and other healthy exercises
C.But you are not in rural area
D.Trees take pollution out of the air
E.In 2033,it will have 5 million trees
F.It has many kinds of birds in the country
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