Responding to the U.K. government's announcement that it will press ahead with potentially 15 new nuclear reactors at 10 sites, Jeremy Leggett lists 12 compelling reasons why this is a  rash and reckless plan. (Social entrepreneur Jeremy Leggett is founder and Chairman of Solarcentury, the UK's largest solar solutions company, and SolarAid, a charity set up with Solarcentury profits. He is author of The Carbon War and Half Gone.)