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Of all the peoples of the world, the Chinese are probably the most at home with their excrement. They know its value. For 4,000 years they have used raw human feces to fertilize fields.

China is a main energy consumer and, therefore, is also a big greenhouse gas emitter. We must use energy resources rationally and must conserve. This needs us to adjust our economic structure, transform the mode of development, to make economic development more dependent on progress of science and technology and the quality of the work force.

China leads the world in energy consumption, carbon emissions, and the release of major air and water pollutants, and the environmental impact is felt both regionally and globally.

Energy is one topic on which different countries can work together collaboratively. If we can all produce energy from an element that's available in abundance on our planet, that would be a good thing, but we have to learn how to produce energy in large quantities, cheaply, efficiently and without detriment to the environment.

If we can go some way to creating a vibrant anaerobic digestion industry here in the U.K., we will be reaching our goals both in terms of economics and the environment.

The consumption and production of energy is a major component of the global economy.

China's headlong rush to industrialize was pursued with the most Marxist of prejudices - bending nature to man's will. That's a desperately hard trick to pull off when one fifth of humanity, having previously subsisted on 7 percent of the world's freshwater supply, decides that it wants to instantaneously increase its caloric intake.

The Chinese have done some extraordinary things in terms of the investments they've made in alternative sources of energy.

By increasing the use of renewable fuels such as ethanol and bio-diesel, and providing the Department of Energy with a budget to create more energy efficiency options, agriculture can be the backbone of our energy supply as well.

Chinese emissions are a problem not just for its own people but also for the world. It has now overtaken the U.S. as the biggest carbon emitter; most of the coal that is burned anywhere on Earth is burned in China.