The chimney of a rare earth metals factory billows smoke near the town of Damao, in China's Inner Mongolia Autonomous Region October 31, 2010. China supplies 97 percent of rare earths used worldwide, and they go into magnets, bearings and high-tech components that go into computers, vehicles and, increasingly, clean energy technology such as wind turbines and hybrid cars. Picture taken October 31, 2010. TO MATCH STORY CHINA-RAREEARTHS/ REUTERS/David Gray (CHINA - Tags: ENERGY ENVIRONMENT EMPLOYMENT BUSINESS SOCIETY)