Earth and Human Activity

Environmental indicators look at the effects of human activities on the environment as well as the implications of those actions on human health, quality of life and the integrity of ecosystems. Environmental indicators are usually scientifically-based information that describes environmental conditions and trends. Reliable information about the current state of the environment and the factors that stress it, is essential for making appropriate future commitments of time, energy, and resources to meet environmental challenges. (EPA, http://www.epa.gov/greenkit/indicator.htm, 2015)