Guardian: The invisibility of modern air pollution gives the impression that air pollution problems are a thing of the past. Today is it rare to see persistent black smoke from a factory chimney or clouds of thick black smoke from traffic. This February provided some good opportunities to see air pollution directly, if you knew where and when to look.
Easterly winds brought cold, polluted air from Europe to the UK. The worst conditions were measured on 19th February in the Midlands, in Birmingham and Nottingham,...