Marjan van Aubel (Design alchemist, sustainable future aesthetics)
Ben Ayliffe (Greenpeace Arctic campaigner)
Guy Battle (Sustainable Business developer)
Dr Helen Caldicott (Physician, author, anti-nuclear advocate)
Charlotte Du Cann (writer, editor, community activist)
Dr Seamus Garvey (Engineer at Nottingham University, Inventor)
Natasha Geiling (Sustainability journalist, currently for Smithsonian)
Dr Peter Gleick (Scientist, world expert on water and climate)
David Helvarg (Founder Blue Frontier Campaign)
Jennifer Kingsley (Writer, radio producer, naturalist)
Dr Andreas Mershin (Physicist at MIT, Inventor)
Katiana Murillo (Journalist and climate change adaptation media campaigner, Latin America)
Meena Nallainathan (Writer, editor, activist)
Jeff Orlowski (Filmmaker and advocate)
Dr Daniel Pauly (Marine biologist, world expert on human impact on global fisheries)
Margo Perin (Writer, editor, activist)
Dr Kate Rawles (Environmental philosopher)
Dr Carl Safina (Prominent marine conservationist, creator of TV series Saving the Ocean)
Bert Schouwenburg, (GMB International Officer)
Joao Talocchi (Greenpeace Palm Oil campaigner)
Abdel Karim Traoré (Climate change adaptation and mitigation expert, Africa)
Will Travers (Animal welfare and conservationist, founder Born Free foundation)
Greg Valerio (Fair Trade gold pioneer)
Plus Amelia & Gemma.