Photo: Global Environment Facility/Flickr Waste – its generation, collection, and disposal – is a major global challenge of the 21st century. Recycling waste drives environmental sustainability by…

Martha Chen, Ede Ijjasz-Vasquez |

Wind turbine farm in Tunisia. Photo: Dana Smillie / World Bank It's been two months now since the historic climate change conference, COP21, wrapped up in Paris, concluding with 195 countries…

Christian Grossmann |