Foto 17
Solar panels stand in a field of flowers at Acciona SA's solar power station in Amareleja, Portugal, on Tuesday, April 14, 2009. The 46-megawatt facility, has a production capacity of 93 million kilowatt-hours a year, and is the world's biggest photovoltaic electricity plant. (Mario Proenca/Bloomberg News) in: http://www.boston.com/bigpicture/2009/04/earth_day_2009.html#photo38
