Tighter limits on downwind air pollution from 23 states have been proposed by the U.S. Environmental Protection Agency.
The agency also plans to remove Florida and South Carolina from the "good neighbor" rule because they don't send significant amounts of air pollution to other states, the Associated Press reported.
The rule applies mainly to states in the South and Midwest that produce air pollution that travels to the East Coast.
"This update will help protect the health and lives of millions of Americans by reducing exposure to ozone pollution, which is linked to serious public health effects including reduced lung function, asthma ... and early death from respiratory and cardiovascular causes," EPA Administrator Gina McCarthy said in a statement, the AP reported.
