052019 404 Xcel Energy said today the Minneapolis-based utility plans to retire its two remaining coal plants in the Upper Midwest by 2030, a decade earlier than scheduled, bringing praise from environmental groups. The company also announced plans to expand wind and solar energy, use cleaner natural gas, and operate its carbon-free nuclear plant in Monticello, Minnesota, until at least 2040. That would extend by a decade the life of the nuclear plant, currently scheduled to be retired in 2030,