FILE - In this June 3, 2017 file photo, the coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, stands in the distance in Juliette, Ga. Technology now in limited use removes about 90 percent of carbon dioxide from the smokestacks of coal-fired power plants, but energy experts say cost remains the chief obstacle to bringing the “clean coal” touted by President Donald Trump into the mainstream.
FILE - In this June 3, 2017 file photo, the coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, stands in the distance in Juliette, Ga. Technology now in limited use removes about 90 percent of carbon dioxide from the smokestacks of coal-fired power plants, but energy experts say cost remains the chief obstacle to bringing the “clean coal” touted by President Donald Trump into the mainstream. Branden Camp, File AP Photo
FILE - In this June 3, 2017 file photo, the coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, stands in the distance in Juliette, Ga. Technology now in limited use removes about 90 percent of carbon dioxide from the smokestacks of coal-fired power plants, but energy experts say cost remains the chief obstacle to bringing the “clean coal” touted by President Donald Trump into the mainstream. Branden Camp, File AP Photo

Scientists say cost of capturing CO2 declining

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