Guardian: Air pollution from traffic and industry is dangerously high in east London, according to tests by local "citizen scientists".
Local environment groups placed 36 diffusion monitoring tubes on structures close to parks, bus stops, busy roads and in residential areas, to measure emissions in more than 30 streets. They were left for four weeks and only four were removed or stolen.
Analysis by a laboratory used by government found that concentrations of the toxic exhaust pipe gas nitrogen dioxide...