PBS Frontline/World - China: Undermined

More than in any other country, coal is the lifeblood of China's booming economy. Coal-fired power plants provide 70 percent of the country's electricity, and more than 30,000 mines operate throughout the country -- about 20 percent of which are illegal and, thus, unregulated.

China is also the most dangerous place in the world to be a coal miner. On average, 13 people a day die in mine accidents there, and more than 80 percent of mining deaths worldwide happen in China.

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• China: Undermined