Ecology is the study of the relations of organisms amongst themselves and with the environment surrounding them. In this sense, ecology does not only study plant and animal populations, but also the way human beings relate with the other forms of life and the environment that contains them. The phrase "but man is a part of nature, and his war against nature is inevitably a war against himself" suppports one of the principles of ecology, that all forms of life are interrelated, and therefore, to affect a part of the enviroment is to affect it as a whole and all forms of life in it.
