Are these the seven most sustainable cities? - in pictures

Are these the seven most sustainable cities? - in pictures

Landmarks around the world went dark for Earth Hour this weekend but many cities are making longer term moves towards sustainability. From Hamburg’s coffee pod ban to São Paulo’s ad-free streets – seven cities taking radical steps

http://www.theguardian.com/sustainable-business/gallery/2016/mar/20/hamburg-coffee-pod-ban-bogota-buses-sustainable-cities-in-pictures

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