Heathrow runway 'white elephant'
An important think tank has dealt a blow to government plans for a new runway at London's Heathrow Airport and brought hope to environmentalists fighting to stop the development.
The report suggests that any such runway development should only be allowed if lower emissions and sound pollution issues are better addressed.
A third runway at Heathrow will be a "white elephant" unless aviation is made greener, a think tank has said.
The Institute of Public Policy Research said if the runway is approved, conditions for meeting noise and emissions targets must be attached.
After months of speculation, the prime minister is expected to rubber stamp the controversial plans this week.
A Sunday newspaper claims London Mayor Boris Johnson will lead a legal challenge if the scheme is agreed.
The Sunday Times says a report prepared for the Conservative mayor has concluded the proposed runway at the west London airport would put the health of Londoners at risk and blight communities under the flight path.