Forbes: This week, President Obamas environmental agenda gained a victory.
The Supreme Court revived a 2011 Environmental Protection Agency regulation, known as the Cross-State Air Pollution Rule, limiting power-plant emissions blowing across state lines. The ruling will now require 28 states to reduce power-plant emissions, which hurt the air-quality in states located downwind.
The new regulation stands to affect approximately 1,000 power plants in the eastern half of the U.S., many of which may...