More than $20bn is spent on chewing gum around the world each year. A lot of that gum will end up stuck to the streets. That's why gum is the second most common kind of street litter after cigarette materials. In the UK councils spend around £50m each year cleaning up the mess.
But British designer Anna Bullus had an idea - what if the sticky stuff could actually be recycled and turned into useful objects?
Presenter: Harriet Noble
Reporter: Dougal Shaw
Photo caption: Shoe sole made of chewing gum
Photo credit: BBC
