This short HACAN briefing outlines the case against a 3rd runway at Heathrow: http://hacan.org.uk/wp-content/uploads/2014/06/The-Case-against-the-expansion-of-Heathrow-Airport-2.pdf
This short HACAN briefing outlines the case against a 3rd runway at Heathrow: http://hacan.org.uk/wp-content/uploads/2014/06/The-Case-against-the-expansion-of-Heathrow-Airport-2.pdf