Can Mexico City's roof gardens help the metropolis shrug off its smog? | World | The Gu... - 1 views
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Danny OCallaghan on 27 Apr 14"The gardens are home to one of a growing number of azoteas verdes - or green roofs - that are springing up around Mexico City as part of the metropolis's efforts to purge its air of the pollution that has long been among its least-desired claims to fame."