classificationOne possible version: Society produces a lot of rubbish， such as leftover food， waste paper， plastic bottles and batteries every day。 It has become a big headache in every city。 

How to solve this problem? I think rubbish classification is a good way of dealing with it。 Firstly， rubbish classification can reduce the amount of rubbish and the rubbish pollution to the environment。

What is more， it can recycle resources， which will do good to our environmental protection。 Since rubbish classification has so many advantages， our government should take effective measures and immediate actions。 

Different dustbins should be placed in public places so that residents can leave their sorted rubbish in them。