China is ready to share experiences in agricultural development with other developing countries within the framework of South-South cooperation and provide various kinds of assistance in its power, Hu said.

Since 2003, China has provided nearly 300,000 tons of food assistance, built 14 integrated agricultural projects, established more than 20 demonstration centers for agricultural technologies overseas, and trained more than 4,000 managerial and technical staff in the field of agriculture for other developing countries.

At the major economies' meeting on energy security and climate change, Hu called on these economies to take the lead in addressing climate change. Major economies should play an exemplary role in fulfilling the UN Framework Convention on Climate Change and its Kyoto Protocol, he said. They should actively advance international negotiations and take the lead in carrying out practical cooperation to ensure that environmentally friendly technologies are available and affordable to developing countries, Hu added.

Ding said China has taken a series of concrete measures to save energy and cut greenhouse gas emissions. It also takes provincial governors' efforts in this regard as a yardstick to access their performance, he said.

Who's responsible?

China has set the goal of reducing energy consumption per unit of GDP by 20 percent and cutting the total discharge of major pollutants by 10 percent from 2005 levels and raising its forest coverage rate to 20 percent from the 2005 figure of 18.2 percent by 2010. Hu told his counterparts that China is firmly committed to the goal.

While every country is responsible for mitigating climate change, developed countries should take on more responsibilities, Jin said. Developed countries are obligated to do so because they not only discharged large amounts of pollutants as they sought industrialization but also have relocated polluting industries to developing countries, damaging the environment in these countries, he said. Moreover, they are capable enough to make greater contributions to welfare of the international community. He said he strongly believes in the principle of "common but differentiated responsibilities."

Leaders of the G8 nations agreed on a long-term target of at least halving global greenhouse gas emissions by 2050, a decision that Jin regards as the most concrete progress of this year's G8 Summit.

Countries hold different positions on oil and food price rises because of their varied interests, Jin said. The United States tends to shift its responsibilities to others and seek solutions to its own benefit, he said. The reason why it stresses rising demands of oil and food is that it intends to put the blame on large developing countries such as China and India, he said.

While acknowledging rising demand does contribute to oil and food price rises, Jin said the roles of different factors should be weighed carefully.

A secret World Bank report, recently obtained by The Guardian newspaper, shows that biofuels have forced world food prices up by 75 percent, contradicting U.S. Government's claims that biofuels contribute less than 3 percent to food price rises.