environment；
A：Do you hear the news that the government has put a nationwide ban on the use of free plastic bags?
B：Certainly.The problem of "white pollution" caused by used plastic is becoming increasing scrious.
C;Yes ,plastic shopping bags contribute a lot to the problem .
A:And ,the environment ia very important to us .But in the past ,we have ingore this problem.That is a pity.
B:I agree with you .It is our buty to protect our environment.
C:There is no denying that many people do not do that.
A;so the ban is a good way to reduce the pollution caused by used plastic.
B:That is right .As a student ,we shoud make contributions to protect environment.
C:Yeah,we can turn to cloth bags and shopping baskets from now on .
A and B：That ia a good idea! environment；
A：Do you hear the news that the government has put a nationwide ban on the use of free plastic bags?
B：Certainly.The problem of "white pollution" caused by used plastic is becoming increasing scrious.
C;Yes ,plastic shopping bags contribute a lot to the problem .
A:And ,the environment ia very important to us .But in the past ,we have ingore this problem.That is a pity.
B:I agree with you .It is our buty to protect our environment.
C:There is no denying that many people do not do that.
A;so the ban is a good way to reduce the pollution caused by used plastic.
B:That is right .As a student ,we shoud make contributions to protect environment.
C:Yeah,we can turn to cloth bags and shopping baskets from now on .
A and B：That ia a good idea!