Author, academic, and environmentalist, Bjorn Lomborg is an adjunct professor at the Copenhagen Business School, director of the Copenhagen Consensus Centre and a former director of the Environmental Assessment Institute in Copenhagen. He became internationally-known for his best-selling and controversial book The Skeptical Environmentalist.

Co-Founder of Architecture for Humanity, Cameron Sinclair's work is to find architectural solutions for humanitarian crises and to bring design services to communities in need. A 2006 TED Prize, Sinclair has been honored as a visionary who seeks to "positively impact life on this planet."

Principal of William McDonough & Partners, William McDonough is focused on designing environmentally sustainable buildings and transforming industrial manufacturing processes. In 1996 he became the first and only individual recipient of the Presidential Award for Sustainable Development. Author of Cradle to Cradle: Remarking the Way We Make Things, he envisions a society that does not produce waster but instead produces nutrients from former waste products.

Author of Built to Last: Successful Habits of Visionary Companies and Good to Great, Jim Collins is a business consultant, author and lecturer on the subject of company sustainability and growth. He is a frequent contributor to Harvard Business Review, Business Week, Fortune and other magazines.

Author and co-author of 29 books and renowned experimental physicist, Amory Lovins' work is consistently focused on harnessing market forces to promote resource efficiency as a solution to a variety of economic, social, and environmental problems. A highly sought-after speaker, Mr. Lovins has addressed many leading U.S. and overseas business, policy, energy, automotive, environment, and development groups.

Civil rights and environmental advocate working to combine solutions to social inequality and environmental justice, Van Jones is the president and founder of Green For All and the Ella Barker Center. He is a Senior Fellow with Center for American Progress and a Fellow at IONS. His work is currently focused on green economic development.

Author of Developing Green: Strategies for Success and The Insider's Guide to Marketing Green Buildings, Jerry Yudelson is a leading green building expert in the US and has trained 3,000 people in the LEED rating system. He was the co-founder and director of the Green Building Services consulting unit.

Star of the Animal Planet TV Series "Whale Wars."

Founder of the Sea Shepherd Conservation Society, Director of the Sierra Club and the Founding Director of the Greenpeace Foundation. Called the "world's most aggressive, most ...

Christine Ervin's career as an environmental leader spans executive positions in both national and state government as well as in the nonprofit sector. As the President and CEO of the U.S. Green Building Council, she led its growth from 200 ...

While global warming currently dominates environmental headlines, another battle rages to protect endangered animals and habitats in what remains of the world forests. The park rangers of these terrains search for illegal traps set by ...