Water, Water in my Yard, if Only I Had a Yard!

In the seventh grade I read Dune, and ever since I've been terrified of the day when we'd all have to suit up in special outerwear that collected our sweat so we'd have what to drink. The dread of it still keeps me awake some nights. Which is why if I lived in a house that had a small backyard, I could end up buying the rainwater hog. Because, you know, my house probably wouldn't have a green roof, but why not a hog?