Ecology is the study of how living things and the environment interact together.Ecology Global Network:What is ecology? A group of organisms living together in an area is called an ecosystem and is the basic unit of study in ecology. Ecosystems can vary widely in scope and can be microscopic, regional or global in scale.The Environmental Literacy Council:Ecosystems Most consider ecology a branch of biology. However, the broad and encompassing nature of the field means that elements of many other scientific disciplines are included.New Hampshire Public Television: NatureWorks: Ecosystems

Ecology is one of the primary ways that the impact of human changes on the environment can be studied. Therefore, it is a key science for investigating the potential of human involvement in global warming and for developing ways to reduce human impact on the environment.Ecology Global Network: The Ecological Impact of the Industrial Revolution(May 18, 2008)