text: We we think of saving the earth we think of recycling, reusing things, and reducing. Did you know that passenger cars are responsible for 12 percent of greenhouse gases and up to 50 percent in some car intensive areas in the United States.(According to "In German Surburb, Life Goes On Without Cars" By: Elisabeth Rosenthal). In Paris there pollution was almost record setting and so they ordered that even-numbered license plates leave their cars at home or pay a fine of $31. Almost 4000 drivers were fined that day  and 27 got their cars impounded. Most of the cars in Paris are diesel ran so the smog is worse. If they would cut down on their car use it would lower the smog.