DETROIT (WWJ/AP) – DTE Energy Co. plans to shut down eight coal-fired units at three power plants in Michigan within the next seven years.

The Detroit-based utility announced Wednesday the units being retired between 2020 and 2023 are at the River Rouge facility, the St. Clair facility in East China Township and the Trenton facility.

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DTE says the plants together generated about 25 percent of electricity produced by the utility in 2015 or enough to power 900,000 homes.

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Earlier this year, DTE retired three coal generating units due to age and projected future costs. The utility says it will replace coal generating units with a mix of newer, more modern and cleaner sources of energy such as wind, natural gas and solar power.

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