<a href="http://blogs.independent.co.uk/openhouse/2008/11/choke-point.html">Chris Ames: Choke Point</a>

It’s looking increasingly likely that pollution will be the choke point for plans to expand Heathrow airport, at least in the short term. The head of the Environment Agency and the European environment commissioner have repeatedly voiced concerns about the impact on "air quality" of more flights and more traffic.