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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。

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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。

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TfL also said that IBM would also administer the low emission zone from November 2009.

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It is similar to what TfL did with the introduction of the Low Emission Zone.

BBC: Is TfL Games Lane 'warnings not fines' tactic working?

Mr Birkett said this was a backward step, especially as the low emission zone was the mayor's own policy.

BBC: Boris Johnson announces plans for Ultra Low Emission Zone