Ethical businesses are developing new ways to tackle air pollution - a major public health threat in developing nations - by making affordable air purifiers for the most vulnerable people in the worst hit countries like China and India. PLACE
Read MoreGhent’s transformation produced shorter journeys, cleaner air and a cycling explosion. THE GUARDIAN
Read MoreYork, England, population 150,000, plans to eliminate cars from its city center by 2023, while shifting to electric buses, launching an on-demand shuttle service, and adding new bike lanes. FAST COMPANY
Read MoreA growing wave of clean-air activists — including a group called the "Scary Mums," environmental lawyers, tech entrepreneurs and even foreign embassies — is using new sources of pollution data to pressure the government to take action. NPR
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