Calvin show Hobbes some trash dumped outside. He says people seem to forget others have to live on the planet. Calvin doesn't understand why humans evolved as thoughtless, shortsighted creatures. Hobbes says it can't stay that way forever. Calvin asks if Hobbes thinks they'll get smarter. Hobbes says that's one of the two possibilities. Calvin stops and thinks. He says maybe they'll stop polluting before it's too late. Hobbes says they're all holding their breath.