Hyundai Motor Co.'s quick embrace of downsized engines, electric hybrids and other anti-pollution technology helped the company unseat Honda Motor Co. as the most environmental automaker, a scientific research group said.Toyota Motor Corp., Nissan Motor Corp. and Volkswagen AG rounded out the top 5 in the rankings released today by the Union of Concerned Scientists, a nonprofit that works on climate change and nuclear-weapon control.
Ford Motor Co., General Motors and Chrysler Group were at the bottom.
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