John Vidal travels to Manila, one of the top three most polluted cities in the world to see (and smell) the scale of the problem. Plus, Sam Jones reports on Mexico City’s programme to improve air quality • Can Mexico City’s roof gardens help shrug off smog?
John Vidal travels to Manila, one of the top three most polluted cities in the world to see (and smell) the scale of the problem. Plus, Sam Jones reports on Mexico City’s programme to improve air quality • Can Mexico City’s roof gardens help shrug off smog?