Roundup: London expands controversial Ultra Low Emission Zone

LONDON, Aug. 29 (Xinhua) -- The Ultra Low Emission Zone (ULEZ) was expanded across London on Tuesday to help improve the megacity's air quality, but the move has drawn widespread criticism at a time when households have already been financially squeezed.

The ULEZ is now in force 24 hours a day, seven days a week, every day of the year except Christmas Day, to help clear London's air by reducing the number of vehicles that fail to meet emissions standards, according to Transport for London (TfL), a government organization.