An environmental advocacy organization launched a lawsuit against U.S. Environmental Protection Agency administrator Gina McCarthy on Monday, alleging the agency violated the Clean Air Act by failing to timely regulate soot emissions from some of America’s big cities.
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California Gov. Jerry Brown signed a memorandum of understanding with China's lead international climate negotiator, Xie Zhenhua, in which they pledged to work together on sharing low-carbon strategies and create joint-ventures on clean technologies.