Xcel plans Colorado coal ash cleanup as toxins seep into groundwater
BOULDER — When Xcel Energy stopped burning coal at its Valmont Power Station in 2017, it left 1.6 million tons […]
BOULDER — When Xcel Energy stopped burning coal at its Valmont Power Station in 2017, it left 1.6 million tons […]
“The sky that shows around the dim white building is a peculiarly tender blue, almost a turquoise, which invests the