Dozens of British cities – from Brighton, Southend and Leamington Spa to Glasgow, Manchester and Belfast – are breaching safety limits
'If you can breathe them in, they could potentially deliver chemicals to lower parts of our lungs, maybe even across into our circulation'
Nine new routes will also be pedestrianised every Sunday and public holiday
People with lung or heart conditions have been advised not to exert themselves if outside
These letters appear in the 5 April digital edition of The Independent
The pigeons monitor air pollution as they fly around the city using senors attached to their backs
Policy Exchange said that car manufacturers should be held responsible for air pollution
The smoggy capital will also double the number of air monitoring stations
Campaign groups are calling on the Government to do more to tackle 'breathtaking' air pollution levels
Smog levels in the Italian cities have exceeded healthy levels for more than 30 consecutive days
Any littering 'not in a bin' will be targeted
China's capital city has again come to a halt due to dangerous levels of air pollution, with people advised to stay indoors
The annual average air pollution in Delhi is more than twice as bad as Beijing's
In London, the air quality index stands at 28. In Beijing, the day Girl X was diagnosed with lung cancer, it was 876. The scale is only supposed to reach 500
The new traffic system was dismissed as 'not comprehensive' by the city's high court
'I feel my throat totally congested with phlegm and it feels very itchy. But I'm more concerned about the health of my 7-year-old kid'