Air pollution, already high in areas near the airport, would increase and could blight up to 47,000 homes unless a low-emission zone was put into place.

机场附近的空气污染已经十分严重，除非建立一个低排放区，否则情况将不断恶化甚至可能殃及47000个家庭。

The new ultra-low emission zone (Ulez) is likely to be a big issue in next year's mayoral election.

“超低排放新区（Ulez）”很可能是明年伦敦市长选举的重大议题。

We are also proposing to include the dirtiest lorries and vans in the London low emission zone by early January 2012.

同时我们也计划2012年一月之前在伦敦建立低排放区，卡车等最污染空气的机动车也在规划之内。