text: Furthermore, these gases create smog. Smog is similar to fog but instead it has gases emitted from cars in it. Smog is usually thick and can be hazardous to environments. It was so bad in Paris that they set a partial driving ban in which people couldn't not drive becuase they didn't want the smog to get worse. The problem here is that people still continued to drive out even though there was a ban being inforce. So, this is another issue in which cutting back on car uses can fix. If we switch to biking to places that are withing biking distance or walking to place that are walking distance than we wouldn't have to worry about smog, or bans.