How harmful is particulate matter and what oxides of nitrogen are in the long term? The current limit values in Europe are useful, on what Basis they were set, and driving bans are the solution? The dispute therefore, which can demonstrate the science to date about the health effects of air pollutants, which makes the policy out of this Knowledge, and what it all means for our health. Time to focus on what is known about gases and their consequences. Test your Knowledge in this Quiz.