Jeremy Leggett is a social entrepreneur and author of The Carbon War, Half Gone and The Energy of Nations. He is founder and chairman of Solarcentury, the UK's fastest growing renewable energy company since 2000, and founder and Chairman of SolarAid, an African solar lighting charity set up with five percent of Solarcentury's annual profit's, itself parent to a social venture, SunnyMoney, that is the top-selling retailer of solar lights in Africa. An Entrepreneur of the Year at the New Energy Awards, he has been described by the Observer as 'Britain's most respected green energy boss'. He was the first Hillary Laureate for International Leadership in Climate Change, and a CNN Principal Voice. He chairs the financial-sector think tank CarbonTracker, and is a risk consultant to large corporations. He writes and blogs on occasion for the Guardian and the Financial Times, lectures on short courses in business and society at the universities of Cambridge and St Gallen, and is an Associate Fellow at Oxford University's Environmental Change Institute.