text: "After days of near-record pollution, Paris enforced a partial driving ban to clear the air of the global city." The law stated even numbered license plates couldn't drive one day, and the other, odd liscense plates couldn't. A little thing like this had a big effect. Duffer then reported "Congestion was down 60 percent in the capital of France, after five-days of intensifying smog." Elizabeth Rosenthal in the aritcle