On environment protection

Terry Tamminen, former secretary of the Californian Environmental Protection Agency, brought up environmental issues that loom over China. He said the country's use of energy could "either propel or stifle the Chinese dream".

"Does the world have enough energy to power China's industrial needs - which in turn powers employment and economic growth - for everyone?" he asked. "Will China's appetite for fuel starve the rest of the world for its energy supplies?"

Tamminen also mentioned pollution, which he said caused nearly 1 million premature deaths annually among China's children and elderly. On the plus side, he pointed out that China does produce a lot of clean energy; it just doesn't use it enough of it.

"In 2010, it surpassed the United States as the world leader of producing wind power - China produces more solar panels than all of the other global producers combined," he said, but they just don't utilize them.

Gregory Chin, associate professor of political science at York University in Toronto

One of the key reform objectives for China is to move toward a new model of sustainable and equitable development, one in which there is more balance between ecological sustainability and growth, and provides better sustenance opportunities for all.