Heathrow runway 'within EU pollution laws'

New, independent research seen by the BBC suggests Heathrow airport could build a new runway without breaking European pollution laws.
The study measured poisonous nitrogen dioxide (NO2) levels using 40 sensors in and around the airport.
It then used modelling to predict what would happen in the future.
Ministers will decide within weeks whether to enlarge Heathrow or rival Gatwick and the environmental impact will play a big part in that decision.
The work was led by the University of Cambridge and has no formal links to any airport or the government.
Prof Rod Jones from the University of... read more