The value of green technologies and systems is that they are largely decentralised or semi-decentralised.
Urban consumers in Africa are rapidly growing and they are demanding high quality, pesticide free food.
Africa's cities are melting pots of activity and interaction. There are fears that the continent's next major modern disease crisis will emerge from them.
Involving the public in data collection - through crowd sourcing - to produce critical public services such as maps and transit apps helps build new conversations on how the system can be improved.
Architects and those working on the built environment can learn valuable lessons about their discipline – how it's taught, and how it's carried out – from the 2015 student protests.