A report says three North Carolina cities could see their number of bad air days double by the middle of this century unless global warming is reduced to curb smog.
The analysis performed for the National Resources Defense Council found that Asheville and Wilmington could see an additional four days each summer with air quality readings considered unsafe.
The report says Raleigh, the state's second largest city, could see nine additional days measured unhealthy based on current federal clean-air standards.
According to the report, higher summer temperatures will generate more ozone. It's a component of smog that medical experts blame for asthma attacks in children and increased respiratory problems among the elderly.