text: One of the major priorities right now is air pollution from gas emissions and that is why countries are slowing down motorvehicle usage. In Paris 147 micrograms of particulate matter were found, 114 in Brussels and almost 80 micrograms in London. Most of that is because of driving. With diesel fuel ranking over gasoline, we are not getting anywhere. Countries in Europe and South America have put in fines and days that people are not allowed to drive because of how bad the smog is getting in some of the areas.