Chicago and its outlying suburbs create 1.5 billion gallons of wastewater every day. Since this isn't the 1880s anymore and you can't just let the effluence run back into Lake Michigan, you've got to clean it. Here. At the biggest wastewater treatment plant on Earth.
I've been re-watching Carl Sagan's Cosmos in Hulu. I watched the series when I was a kid, and it opened my mind in an unforgettable way. I forgot how mesmerizing it can be to listen to his explanations. [Thanks John!]
Blast that shit with a $12.99 can of Poop Freeze, turning your pet's hefty hunk of steaming junk into an ice sculpture complete with a white crusty film that makes it oh-so-scrumptulicious to pick up.