The Great Lakes hold 20 percent of the world’s fresh surface water. According to an article from Environmental Health News—Great Lakes Legacy Contaminants Decreasing, But Newer Ones on the Rise—legacy contaminants are decreasing more quickly than previously reported in three of the Great Lakes, but have stayed virtually the same in two other lakes, according to new research.

German power producers are poised to pay customers to use electricity this weekend. Wind generation is forecast to climb to a record on Sunday, creating more output than needed and driving electricity prices below zero. It would be the first time this year that the average price for a whole day is negative, not just for specific hours.

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For all the talk about coal-industry employment, solar energy accounted for more than twice as many jobs last year, about 350,000 workers, according to a report Wednesday from the Energy Futures Initiative, a Washington-based nonprofit headed by former U.S. Energy Secretary Ernest Moniz.