text: Due to citizen's of Bogota, Paris, and Germany not using cars and having to switch to bikes, walking, and electric bikes; has greatly reduced toxic gases in the environment. Due to individulas in Paris not excessively using cars the amount of smog has reduced. According to Robert Duffer " after days of near-record pollutions, paris enforced a partial driving ban to clear the air of the global city( Paris bans driving due to smog 10)." Paris has enforced strict rules that rejects people from driving, also a switch to diesel fuels. In return these ideas have lowered the level of smog in Paris creating a cleaner environment for the citizen. Not only has Paris help reduce toxic gases from entering our environment, but so has Bogota. In the article Car-free day is spinning into a big hit in Bogota, Andrew Selsky stated that this has been Bogota's "thrid year straight that cars have been banned for one day" and the only motorized vehicles they have used are "buses". This switched has dramatically cut traffic, rush hour, and the amount of smog left in the air. Although there is still traces of pollution after this day it has lowered. The reasons are simple, using less cars makes less gases, also those who go the day without using cars may like the change better and permantely switch to a lifestyle without cars.