Nature and EnvironmentBarcelona is going greenTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and Environment01/09/2020January 9, 2020As global warming becomes an ever greater threat to humanity, the Spanish city of Barcelona is taking action. Rooftop gardens and so-called biodiversity corridors are part of the plan.https://p.dw.com/p/3Vq77Advertisement