Put pedestrians first to tackle air pollution in this dirty mega-city | Letters

London is one of the most polluted cities in Europe. We cannot keep this under wraps if we are to address the problem (Johnson 'buried' study linking toxic air and deprived schools, 17 May).

The dangerously high pollution levels in the city are harmful to everyone - they're associated with asthma, premature births, lung cancer and heart disease. For children though, the risk is even higher. Their exposure to air pollution is much greater than adults', and studies show that they absorb pollutants and retain them in the body for longer.