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Nearly all problems of global scale—climate change, clean water, sustainable agriculture, healthcare, and even war—list the availability and use of energy as either a principal cause or potential solution. Everywhere we turn, we are hounded by advertisements for “green” technologies such as hybrid cars, wind power, clean coal, smart grids, and compact fluorescent light bulbs. Some technologies promise to be “small steps” toward sustainability, while others make more ambitious claims. Realists agree, however, that a complete solution to the energy challenge will be a patchwork quilt of strategies that includes gains in efficiency, conservation, alternative sources of energy, and changes of habit (gasp!). This essay describes one possible piece of the puzzle: plastic solar cells.










