Coupled human and natural system
Understanding the environmental feedbacks at diverse temporal and spatial scales is important for human, answering some questions such as: how people use the environment, how this use changes the environment, sometimes irreversibly, and how the resultant environmental changes affect people is urgent. This kind of coupling involves a wide systems: demography, civil and environmental engineering, sociology, population ecology, geology, economics, anthropology, ecosystem ecology, genomics, hydrology, limnology, and oceanic and atmospheric systems science.