The Guardian view on London’s low emission zone: doing the right thing | Editorial

Sadiq Khan deserves credit for pressing ahead with a scheme to improve the capital’s airEveryone who cares about public health and environmental regulation should welcome the expansion of London’s ultra-low emission zone (Ulez), which launches on Tuesday. Air pollution is estimated to cause 4,000 premature deaths each year in the capital, with nitrogen dioxide from exhausts being the main danger, along with particulate matter whose effect is likened by scientists to inhaling tiny par