In the mid-1960s a Dutch engineer called Luud Schimmelpennink came up with a scheme to share bikes, and cut pollution. He collected about ten old bicycles, painted them white and left them at different points around Amsterdam. The first scheme didn't last, but it was hugely influential and became part of popular culture; Luud Schimmelpennink himself would go on to invent an early computerised sharing scheme for cars, and to consult on the bike-sharing schemes we see around the world today. In 2019, he spoke to Janet Ball.

Photo: Activists with one of the original white bikes from the first scheme. Credit: Luud Schimmelpennink.