'Green roofs deliver for biodiversity': how Basel put nature on top

For decades, the Swiss city has been transforming its skyline, and now boasts some of the greenest rooftops in EuropeSusanne Hablützel breaks up her work day by staring out the window at a rooftop garden. The view is not spectacular: a pile of dead wood sits atop an untidy plot that houses chicory, toadflax, thistle and moss.But Hablützel, a biologist in charge of nature projects in Basel, is enthralled by the plants and creatures the roof has brought in. "Tree fungi have settled in the trunks, and they are great to see - I love mushrooms. You can also see birds now - that wasn't the case before." Continue reading...