Another way is to double print the paper.

Profesor Li Lin, WWF Head of Consernation Strategy, said, "If you save one ton of paper, that is equivalent to one ton of energy used for producing the paper, that will translate into a reduction of about two and a half tons of CO2. "

This booklet produced by WWF offers guidance for a low-carbon lifestyle. There are 30 ways to save energy, and the booklet covers everything from why to save, what to eat, how to travel, and how to calculate savings.

Profesor Li Lin, WWF Head of Consernation Strategy, said, " All the efforts translated into saved nature, saved the habitat for human as species, together with other species, and we would avoid the negative impact of global warming."

Although there has been much talk about climate change in China, not everyone understands the low-carbon lifestyle.

Policy makers should also play a role.

For example, central heating is supplied by thermal power stations, the majority of offices use non-adjustable heating system, which has lessened users' willingness to save energy.

"As the challenges of global warming increase, low-carbon development is considered the best wya forward in the long term. The govenrment is stepping up efforts to promote the concept of a low-carbon life-style. And o9ne key is to take it from beyong a trend for a certain group, to one that all Chinese embrace."

(CCTV November 29, 2010)