Poo payments: The students being paid to go to the loo
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You may have heard of 'spending a penny' (going for a wee) but what about spending a poo?
Well students at Ulsan National Institute of Science and Technology (UNIST) in South Korea are able to do just that.
They are given a form of digital money or credits to buy things from shops on campus if they use the toilet there.
It is because their number twos are being used to make fuel which powers one of the buildings at the university.
Cho Jae-weon, who is an urban and environmental engineering professor there explains why they are paying people to poo.
"If we think out of the box, faeces (poo) has precious value to make energy and manure. I have put this value into ecological circulation," Cho said.
The poo goes into the eco-friendly toilet.
It is sucked into an underground tank using a vacuum pump, this means less water is needed.
It is mixed with microorganisms which break down the waste and give off a gas called methane.
The methane is used to power a cooker, a fuel cell and a hot water boiler in the building.
How plopping leads to shopping
Students are given digital money called Ggool if they use the eco loo.
They get 10 Ggool a day which they can spend on drinks and snacks at the canteen, or they can use the tokens to buy books.
So what do students think about being paid for their poo?
Postgraduate student Heo Hui-jin said: "I had only ever thought that faeces are dirty, but now it is a treasure of great value to me."
What do you think of this idea? Let us know in the comments.
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