Gregor Gomory hopes to leverage the 'perfect storm' brewing as ocean waste hits the mainstream of environmentalism. His business, ByFusion, makes building blocks out of ocean plastic waste – and he wants to open source how they might be used in communities everywhere.

Elsewhere this week, Vikki Knowles helps digest the week's happenings from across the better business world. And Joss Tantram concludes his 'Big Ideas' series. Enjoy.