New research suggests a third runway at Heathrow could cause an extra 100 deaths a year linked to pollution from the airport.
The report, by Cambridge University and the Massachusetts Institute of Technology, shows a plan backed by mayor Boris Johnson for an airport in the Thames Estuary, would cut the number of deaths.
Scientists say the estuary scheme would see a 70% decrease in the number of people dying due to pollution caused by Heathrow.
Piers Hopkirk has our report:
John Stewart, who is chairman of the Heathrow Association for the Control of Aircraft Noise, believes this report is another reason why a third runway at Heathrow should not be built:
Dr Steven Barrett from Massachusetts Institute of Technology explains more about the findings of his report and how he came to his conclusions:
A third runway at Heathrow would triple the number of early deaths from pollution linked to the airport, a new study claims.
In contrast, moving London's main airport to the Thames Estuary would cut the number of deaths, the report by the Massachusetts Institute of Technology and Cambridge University says.