#266: Poo

Loathe though we are to be scatological, it's time to face faecal facts: the astonishing amount of human excrement on the planet presents a honking environmental challenge.When you think about it, with nearly eight billion of us crimping one out most days, the fact that humans aren't all swimming in the stuff is an impressive log-istical achievement, especially when flush toilets have only existed for 150 years.And despite it being the most normal thing in the world, poos and pooing remains a...