All countries in the world should make joint efforts to deal with the climate change, as this is the common challenge facing mankind, Chinese Premier Wen Jiabao said in Dalian on Thursday, when delivering a speech at the opening ceremony of the 2009 Summer Davos.

"Each and every country, enterprise and individual should assume a due share of responsibility in meeting the challenge," Wen said.

China takes this issue very seriously. The country has developed the national program on tackling climate change, increased resources for scientific research and taken aggressive steps to adjust the industrial structure with a view to saving energy and reducing pollutants, he said.

Official figures showed that through three years of efforts, China's energy consumption per unit of the gross domestic product (GDP) has dropped 10 percent, and SO2 and COD emissions declined 9 percent and 6.6 percent respectively.

"It is important for us to conduct extensive dialogue and practical cooperation in line with the principles and provisions of the United Nations Framework Convention on Climate Change and its Kyoto Protocol," Wen said.

We should take into full account the basic national conditions, stage of development, historical responsibility and per capita emission of different countries in carrying out such cooperation and uphold the framework of sustainable development and the principle of "common but differentiated responsibilities", he added.

Developed countries should recognize their historical responsibility as well as their high per capita emissions, substantially cut greenhouse gas emissions, and extend financial, technological and capacity-building support to developing countries in their effort to tackle climate change, Wen said.

Developing countries, on their part, should exert themselves and make positive contributions to fighting against climate change, he added.