For a time, FedGroup's investment app was the top downloaded app in South Africa. When it launched it was a revolutionary way of investing in bee hives and raspberries. It also epitomised how FedGroup itself operates, and now its amicable CEO Grant Field is following his passion and trying to fish plastic out of South Africa’s rivers. He spoke to Stuff Studios editor-in-chief Toby Shapshak. Read more on Stuff.