These festive London sewermen would like you to remember to throw away your cooking fat rather than running it down the drains, lest it form sclerotic poo-streaked fatty cake that chokes the city's vast cloacae. "It's not every day you get to see a rough-and-ready performance of a Christmas carol by a bunch of guys knee deep in poo."
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.