text: First off studies show that passenger cars are responsible for 12 percent of greenhouse gas emissions in europe.. And those number are 4 times higher in America, the land that you are raising your children in has the highest amount of greenhouse gases on the planet right now. If we could just do what the people in Paris did we can easily fight this smog epidemc. In Paris the put a law out were people with even-numbered license plates had to leave their cars at home or the would face a $31 dollar fine. then they carried out the rule the next day for people with odd-numbered license plates. This rule cut down the congestion by almost 60 percent in the capital. And after five days of this new act the smog over paris finally left.