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: Remaking the Way We Make Things, he envisions a society that does not produce waster but instead produces nutrients from former waste products.

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.

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."

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.

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.

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.

For more than 20 years, Joel Makower has been a well-respected voice on business, the environment, and the bottom line. As a writer, speaker, and strategist on corporate environmental practices, clean technology, and green marketing, he has helped a wide range of companies align environmental responsibility with business success.

As seen on the Animal Planet TV series, "Whale Wars", Captain Paul Watson has been called the "world's most aggressive, most determined, most active and most effective defender of wildlife." Captain Watson is an environmental hero and the bane of illegal whalers and seal hunters around the world. He is founder of the Sea Shepherd Conservation Society, Director of the Sierra Club and the Founding Director of the Greenpeace Foundation. He has received many awards for his work including TIME magazine's Environmental Hero of the Planet in 2000, President George H.W. Bush's Points of Light Award in 1999 and an inductee into the Animal Rights Hall of Fame in 2002.

George Elvin is the director of Green Technology Forum, a leading research and advising firm focusing on emerging green technologies for sustainable business. Elvin is also an associate professor at Ball State University, and his books and ...

Inspired by the dedication of other park rangers who risked their lives to protect endangered animals, Australian park ranger, Sean Willmore, made a documentary called The Thin Green Line. His effort was to bring attention to the dangerous work these wildlife warriors undertook. Today The Thin Green Line Foundation looks after the welfare of rangers families where the ranger has been killed in the line of duty, and is also aiming to better equip rangers worldwide so that they have a greater chance of protecting both themselves and wild areas we all care about.