Top Right: Phill, an appliance designed and manufactured by FuelMaker Corporation of Toronto, Canada, allows natural gas vehicles to be fueled at home, piggybacking on natural gas supply lines used for home and/or water heating. Such devices sidestep problems of fueling infrastructure development for alternative fuel vehicles (AFVs). Photo credit: FuelMaker Corporation.
Center: Rainwater catchment tanks made from recycled pickle barrels in the Chesapeake Bay Foundation headquarters in Annapolis, Maryland, USA. The building is rated as platinum in the Leadership in Energy and Environmental Design (LEED) Green Building Rating SystemTM of the U.S. Green Building Council. Photo credit: Alex Wilson.
Bottom Right: Light emitting diode (LED), a light source based on solid-state lighting technology, directly transforms electrical current into light. Colored LEDs use only 25% of the energy used by an equivalent incandescent bulb. Photo credit: Osram Opto Semi-conductors. http://osram-os.com/osram_os/EN/.