DENVER — A utility serving 3.6 million electricity customers in eight states said Tuesday it will try to eliminate all its carbon emissions from electrical generation by 2050.

Xcel Energy CEO Ben Fowke acknowledged that not all the technologies the company needs to meet that goal are available yet on a commercial scale, but he said he is encouraged by advances in clean energy technology.

Xcel has been increasing its solar and wind power generation but said reaching zero carbon emissions could require the company to continue operating its nuclear power plants and using carbon sequestration.

Carbon sequestration would capture carbon dioxide emissions from burning fossil fuels and keep it out of the atmosphere.

Xcel is based in Minneapolis but made the announcement in Denver, part of its service area. The company has customers in Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin.

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