参考范文：Waste Separation from Your Campus
It’s no doubt that university campuses will produce a large amount of rubbish every day,however,there are fewer college students paying attention to its classification.Factually waste separation is vital to create an environment-friendly campus.Firstly,waste separation does great contribution to the environmental protection. Since some of waste is recyclable,while other is unrecyclable, if all the students could voluntarily differentiate recyclable rubbish from unrecyclable rubbish, the risk of the environmental pollution will be greatly reduced.Secondly,waste separation could save a lot of energy and tirne on its processing. With the rapid increase in the amount of rubbish at the campus, rubbish classmification does not permit of any delay. On the one hand,as the well-educated people,college students should act as hosts of the universities and separate waste from this moment in their daily life.On the other hand,university authorities shouldstrengthen students’ awareness of environmental protection and guide students to separate waste in a reasonable way.
参考范文：The Significance of Waste Sorting
People are producing waste every day, which is a huge burden on the planet’s habitat. Some waste is not degradable naturally, which will exist forever, but some waste can be recycled and reused again.Waste sorting can help divide the reusable waste from the rest. And three are two reasons for doing this. Firstly, the earth is limited in its natural resources, and many products are made from finite resources, which cannot be generated by nature in a short period of time. Simply dumping this kind of products is wasting resources. Secondly, some part of the waste is of value. To reuse and recycle this kind of waste is to save resources to a large extent, which also contributes to environmental protection.Sorting waste is a meaningful deed. If everyone can do it，small things can make a big positive impact on the environment.