Profiting the sun

One of the alternative energy models to hydrocarbons is solar energy, on two fronts: photovoltaic and thermal. Solar panels are still relatively expensive. In large photovoltaic plants are tested other technologies to reduce costs, such as the so-called solar panels of concentration. Joan Ignasi Rosell, University of Lleida, explains what they are. 130 school children of El Cor de Maria, in Valls, collaborate with the “Quèquicom” to demonstrate the operation of a replica of an Andalusian thermosolar plant. Deli Saavedra, founder of the NGO Sol Solidari explains the usefulness of solar cookers and ovens in Africa to reduce deforestation. And the reporter Pere Renom visits the Solar Dechatlon, the most prestigious competition in the world of solar houses.