When viewed at the next quantum level of perspective, from which the Earth is seen as an organism and humans are seen as microorganisms, the human species looks like a menace to the planet. In fact, the human race is looking a lot like a disease -- comprised of organisms excessively multiplying, mindlessly consuming, and generating waste with little regard for the health and well-being of its host -- planet Earth.
Joseph Jenkins, The Humanure Handbook: A Guide to Composting Human Manure
environment