"...the UN can see a way for our astronauts to power their way through the galaxy partly aided by their own excrement."
http://www.news.com.au/technology/sci-tech/united-nations-satellite-unescosat-to-test-viability-of-astronaut-poo-as-space-fuel/story-fn5fsgyc-1225958298744#ixzz16TxOKhXU