World attention will focus on President Hu Jintao when he addresses the United Nations climate change summit tomorrow, marking the first time that China's top leader will discuss his nation's environmental policies and measures to fight global warming at the UN.

The world's largest developing country and one of the biggest emitters of carbon dioxide faces calls from industrialized nations to set binding limits on emissions.

China has long insisted that global warming is caused by the industrialization of developed countries, which account for more than 80 percent of accumulative greenhouse emissions in the atmosphere. Developing countries share "common but differentiated" responsibility in the fight against rising temperatures.