It is no doubt that we produce lots of garbage every day. However, few people have the habit of sorting waste.

This will bring lots of problem. First, the value of things that can be recycled or reused, such as plastic and paper, are reduced. Besides, deal with some waste by burning it will cause serious environmentally pollution.

For those reasons, the government should taken effective measures to call for waste sorting. More publicity campaigns and public service advertisements should run to raise public aware. The government can also design the colorful garbage cans with clear waste-sorting images on it to encourage people to sort waste.

A city，whether big and small，should be clean. Only when we live in a clean city we live a happy life. As we know，a clean city，that disease may be reduced and people's health may be better，are good both to our mind and body. No one believes people lived in a dirty city with waste everywhere can live happy. However，as more and more people moving into our city，it is not easy to keep our city clean. Beside，some factories will pour waste into the air，the river and onto the ground，making it is hard to keep our city clean. To make our city the better place to live in，we still have a lot to do.

Living a low carbon life is becoming increasing important in our modern society. It means reduce the amount of carbon dioxide and other greenhouse gases we released into the atmosphere. There are many simple steps we can take them. Firstly, we can choose eco-friendly modes of transportation such as walking, cycling, or using public transport instead driving. Secondly, saving energies in our homes is crucial. Switching off lights when they are not in use but using energy-efficient appliances (电器) make a significance impact. Lastly, consuming less meat and dairy products, that have a high carbon footprint, and opting for organic produce can make a different.