Mexico City's parks are about to get wireless Internet—and a whole lot cleaner. Mexican Internet provider Terra is setting up stations where dog owners can deposit Fido's leavings in exchange for free WiFi, broadcast from bone-shaped routers, CNET reports. Need more time online? Give your dog a bigger breakfast, because a heavier deposit means more minutes. But don't try sneaking rocks into the machine: Terra plans to have poop police on the lookout. Click to learn how else dog poop is fueling the world.