Xcel Energy recently said it plans to call for $6 billion in wind and solar energy investment as part of what it says will be Minnesota’s most cost-effective way to comply with the Clean Power Plan, the nation’s first ever carbon emission reduction rule for existing power plants.

Xcel Energy recently said it plans to call for $6 billion in wind and solar energy investment as part of what it says will be Minnesota’s most cost-effective way to comply with the Clean Power Plan, the nation’s first ever carbon emission reduction rule for existing power plants.