Photo: SkyPics Studio/Shutterstock Data on the sharing economy (Uber, Airbnb and so on) are scarce, but a recent study estimates that the revenue growth of these platforms has been dramatic. In...

Hernan Winkler |

A waste collection site in Dar es Salaam,   Tanzania. Photo: Cecilia Paradi-Guilford Plastic waste, in particular PET, which is typically found in soda bottles, is becoming abundant in African...

Cecilia Paradi-Guilford, Scott Henry |