Greta Tintin Eleonora Ernman Thunberg is a Swedish environmental activist who is known for challenging world leaders to take immediate action for climate change mitigation. Thunberg’s activism began when she persuaded her parents to adopt lifestyle choices that reduced their own carbon footprint. Thunberg initially gained notice for her youth and her straightforward and blunt speaking manner, both in public and to political leaders and assemblies.

“If you desire peace cultivate justice, but at the same time cultivate the fields and produce more bread; otherwise there will be no peace. The first essential component of social justice is adequate food for all mankind. You can’t build a peaceful world on empty stomachs and human misery.”

Paul Hawken is an entrepreneur and sustainability advocate who founded several companies, including Smith & Hawken, the retail and catalog gardening company. Among his books are the best-selling Growing a Business, which accompanied a seventeen-part PBS series; The Ecology of Commerce, which shows the potential of business and markets to aid the environment; and most recently Natural Capitalism, with Amory Lovins and L. Hunter Lovins. He has served as cochair of the Natural Step, which sets environmental standards for businesses, and currently works as a consultant on sustainability with corporations, governments, and institutions.