At present,Hong Kong people usually waste paper and plastic bags.

During 1960s-1970s old people used waterweed to bunch the things they bought in the market.

It was an environmentally- friendly method.However, some people thought that the use of waterweed was trouble.

The supermarket suggest to use plastic bags because of the inconvenience of waterweed.

However,using plastic bag harms the environment since they cannot be decomposed.

Nowadays people are more concerned the environment, so they suggest to use recycle bags.

Recycle bags have many advantages.For example, they can be reused time and again.

Besides, they can hold more things than plastic bags and waterweed.

Also they can be decomposed so they will not harm the nature.

With so many advantages of using recycle bag, this should be widely promoted.

Therefore, our environment will be better reserved.

Apart from using less plastic bags, we can protect our place in other ways.

The reuse of paper should also be promoted.We can use both sides of paper.

We can take the used paper to the recycle bin.

Moreover, we can recycle the cans and bottles in the same way.

With these methods, Hong Kong can be preserved as a beautiful Harbour.