A family recipe, a childhood memory, a Depression-era handout
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There are few questions more intriguing than whether man survives death — and if so, just what is it that survives?
Solar energy, many scientists believe, is adequate for all the conceivable energy needs of the world. It is safe and clean, but expensive. The main technical obstacle is bringing down the cost of the solar cells, which convert light from the sun directly into electric current.