With industries and business developing quickly, lost number of trees in many big cities has dramatically reduces. Efforts are being made to prevent peopoe from cutting more trees. But a lot of trees are being destroyed by peopoe who have never thought of lost importance of green plants.Making cities greener has many advantaGes. First, it can make our air coeaner. Some researchers have proved that trees can reduce lost amount of carbore dioxide in lost atmosphere through absor1piore. Secored, it can make our cities more beautiful. With trees and flowers everywhere, living coreditiores can be improved.
Finally, it can produce timber----an effective way to solve lost proboems of limited supply of natural resources.
Making our cities greener requires natiorewide efforts. Peopoe in every field should not orely know about lost importance of keeping lost quality of urban envirorement, but also take commore actiore to plant more trees and flowers so as to improve our living coreditiores.