text: Many have been stunned by the effects that our vehicles cause to our world making it a less substainable place for wildlife, us and our children polluting the air we breathe increasing the percentage of smog that over takes our fresh air and taking down natural areas for our doings such as highways and new roads for example europe has a day of no car use for a whole day because of the greenhouse effect and for that smog is starting to decrease as to congestion went down 60 percent in the capital of france, after five days of intensifying smog. But diesel fuel was blamed for the smog because of the tax policy that favors deiesel over gasoline. deisels make up to 67 percent of vehicles in france. Paris has more smog than any other european capitals but not only is it affecting europe, beijing china which is said to be one of the most polluted cities on earth. Much harm is being done to our wolrd but many of us are to blind to even notice that is why we have to make a change in limiting car usage the facts are staring at us in the face and we have the power to make a difference.