Nature and EnvironmentEco-at-Africa - The Environment MagazineTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and Environment01/05/2017January 5, 2017This week, we check out the green rooftops of Johannesburg, learn about Principé's plans to be plastic-free, explore the properties of mud and look at the link between climate change and health.https://p.dw.com/p/2VK9mAdvertisement