It is an avoidable and unequal health burden. In London, for example, more than 400 schools are located in areas that exceed limits for nitrogen dioxide pollution, but four-fifths of those are in deprived areas. Even in countries with a long history of tackling air pollution, the problem has not gone away. The UK, which passed its first anti-air pollution legislation 60 years ago today, is currently involved in a long-running legal battle over its failure to cut pollution to legal levels.
This infographic (posted @ the Guardian) helps explain the main pollutants and their health impacts.