In its "Poisoned Places" series, NPR reports that industry here in Louisiana is emitting more smog-producing chemicals than it should and regulators aren't doing enough to curtail the pollution.
Elizabeth Shogren honed in on Exxon's Baton Rouge refinery and the smoke Almena Poray sees from the front porch of her house, a block from the refinery's south gate.
"That's something you see every day," Poray told the NPR reporter. "Sometimes it's a darker gray, sometimes it's a black smoke coming out."
Ed Overton, professor emeritus of environmental science at LSU, and Robert Berg, state regulatory advisor for Exxon talk more about what Poray is seeing and breathing from her front porch.