text: The first reason why Limited car usage can be a good thing is because it can reduce smog, in heavily crowded cities passerby cars make up over 50% of fossil fuel emissions. Thats over half! reducing car usage can save the enviroment from pollution. in paris driving was partially banned for about a week and the smog in the city was reduced by almost 60%. just driving every other day instead of everyday could help your local enviroment immensly.