Dale Vince never intended to start a business. Driven by a passion for sustainability, he left school aged 15 and became a New Age traveller, living for free in a wind-powered double decker bus. But after building his first wind turbine, he realised that to change the world he needed to be on the grid, not off it. In 1996 he founded green energy company Ecotricity and changed the landscape of UK energy forever. In this book, he shares his single-minded and uniquely purpose-orientated approach to business.