This month, we discuss air pollution. How can countries expand their economies without destroying the health of citizens?
John Vidal reports from the Philippines, where fires, diesel-fuelled Jeepneys and factories have rendered Manila the third most polluted city in the world.
Sam Jones meets Ana Peñalosa of Mexico City's environment ministry to discuss how green spaces and a cycle scheme are being used to improve air quality. Plus, the Guardian's health editor Sarah Boseley brings us the latest health research.
