Meanwhile, the city government of Lake Charles launched its own Ozone Advance Program, which focused exclusively on what private citizens could do. They could drive shorter routes in their cars or walk. They could quit idling their car engines. They could mow their lawns less often. The plan called for a “school flag program”—green for good, yellow for moderate, red for high-ozone—to let “the community know that . . . if you have somebody that has difficulty breathing, today’s not a good day to be outside.”
