regional haze

The state of Utah and Pacificorp have been quarreling with the federal Environmental Protection Agency over what’s called the Regional Haze Rule, a…

Federal regulators are weighing a decision on Utah’s plan for cleaning up haze around the national parks.The Environmental Protection Agency is asking for…

State air-quality officials have updated plans to clean up haze in the skies around Utah’s national parks, and they’re sending it to federal regulators…

Rocky Mountain Power generates most of the electricity to serve its customers in Utah, Wyoming and Idaho by burning coal. But it's planning to shut down…