According to source 2 "Paris bans driving due to smog" by "Robert Duffer," and source 3 "Car-free day is spinning into a big hit in Bogota" by "Andrew Selsky." Talk about banning driving to help clear smog and lower air pollution.

Source 2 talks about banning driving in Paris due to smog."After days of near-record pollution, Paris enforced a partial ban to clear the air of the global city."Paris would only let certian people drive on certain days to reduce pollution."On Monday mortorists with even-numbered license plates were ordered to leave therir cars at home or suffer a 22-euro fine($31).The same would apply to odd-numbered plates the following day."

Source 3 talks about people in Bogota,Colombia hiking,biking,skating or taking the bus to work during a car free day to lower air pollution."In a program that's set to spread to other countries,millions of colombians hiked,biked,skated or took buses to work during a car-free day yesterday,leaving the streets of this capital city earliy devoid of traffic jams.""It's a good opportunity to take away stress and lower air pollution,"said businessman Carlos Arturo Plaza as he rode a two-seat bicycle with his wife. By limiting car usage it has "Parks and sports centers also have bloomed throughout the city;uneven,pitted sidewalks have been replaced by broad,smooth sidewalks; rush-hour restrictions have dramatically cut traffic;and new restaurants and upscale shopping districts have cropped up.

By limiting car usage it has different countries all around the world limiting cars to help reduce smog and air pollution, and can also take away stress. This has also helped parks and sports centers bloom thoughout citys,replace worn out things,reduce traffic and helped open new restaurants and new shopping districts.