Paris's 'Day Without Cars' The radical experiment to cut smog appears to have worked.

Paris’s ‘Day Without Cars’ The radical experiment to cut smog appears to have worked.
City lab
10/6/15

[…] The single-day initiative made 30 percent of the city’s roads off-limits to automobiles, but even that minor reduction in traffic was enough to cut pollution levels—and noise—significantly.

The Guardian reports that according to Airparif, which measures city pollution levels, some parts of Paris registered 40 percent less nitrogen dioxide (which produces smog) in the air on September 27. […]