A short biography of human excrement and its value. Our excrement is a natural, renewable and sustainable resource if only we can overcome our visceral disgust of it. Older cultures knew the value of our excrement – and treated it like gold. We’re finally rediscovering their wisdom. Award-winning poo researcher Lina Zeldovich argues that we should consider human excrement as a natural, fully renewable and sustainable resource. Here she reveals why we should praise ourselves as its potent producers, just like the thriftier societies did before us. 'In our quest to rid ourselves from our dangerous dark matter, we’ve broken the essential rules and laws of Mother Nature. By taking our poo out of the equation, we altered not only our agriculture, but the entire planet’s ecology.'