Paul Hawken is an environmentalist, entrepreneur, journalist, and author. Starting at age 20, he dedicated his life to sustainability and changing the relationship between business and the environment. His practice has included starting and running ecological businesses, writing and teaching about the impact of commerce on living systems, and consulting with governments and corporations on economic development, industrial ecology, and environmental policy. His books have been published in over 50 countries and 27 languages. They include The Ecology of Commerce, Natural Capitalism, and Blessed Unrest. He is CEO of OneSun, Solar.