The Guardian: "Boris Johnson and the 'invisible crisis' of air pollution"

Link to Dave Hill, The Guardian

"Cleaner air: I think we can agree that we need more of it. It is therefore good news is that phase 3 and, indeed, phase 4 of the capital's Low Emission Zone (LEZ) programme came into effect yesterday.

"...  Simon Birkett, director of the Campaign for Clean Air in London (CAL), compares Boris's reaction to all this with the more vigorous public health response of the authorities to London's Great Smog of 1952, which is believed to have led to the same number of deaths in a shorter space of time."