Mexico City on the road to cleaner air - video | Global development | guardian.co.uk - 0 views
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Danny OCallaghan on 04 Oct 12Thanks largely to vehicle emissions, Mexico City was once the world's most polluted urban centre. But over the past decade, a focus on sustainable alternative transport has persuaded a growing number of citizens to leave their cars at home. A heavily subsidised underground network caters for 22m journeys daily, and conditions on the city's overcrowded roads have improved, with the metro bus system and the introduction of public bicycles contributing significantly to reduced pollution levels
