The big idea?
Improve the smell of toilets.
By doing so, it would get people away from emptying their waste in unsanitary ways. It will also allow people to have a more pleasant experience.
Gates is working with a perfume company to achieve this.
The technology can be compared to noise cancelling headphones, except in this case, the ingredient in the fragrance will block the receptors in our brains from perceiving the bad smell.