Today is Clean Air Day - the UK's largest air quality campaign embracing business, schools and the wider community which aims to highlight the dangers of air pollution.
Exclusive new modelling, seen by this programme, suggests that 70 per cent of UK households are in areas that breach three World Health Organisation guidelines on dangerous air pollutants, and 97% breach at least one guideline.
Inside the military-style training camp for anti-vaxxers channel4.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from channel4.com Daily Mail and Mail on Sunday newspapers.