Notes

It's weird to think number twos are particularly heroic. But it's true -- poo can save the world! Explore poo's murky past, what happens to poo after you flush it away, and how we can use the brown stuff to power our cars, homes and even rockets! Discover glow in the dark wee, whether you can get paid to use the toilet, and cutting-edge scientific research into how we can use biofuels to power our planet and save us from climate disaster.