PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Monitoring domestic energy use. Researcher from the University of Washington, USA, using an energy monitor to show how much electricity a family (in background) use in a month. This system also monitors water use. Set out in the yard are the family's electrical and water-using appliances. By far the largest consumer of electricity is the pool pump (bottom left).
Model release available. Property release not required.