Known as the founder of a solar power business called Sungevity, this California-born environmentalist and entrepreneur also wrote the 2012 book Rooftop Revolution: How Solar Power Can Save Our Economy—and Our Planet—from Dirty Energy.
When he was just twelve years old, he participated in an environmental initiative to halt construction of a Tasmanian dam. As a young man, he helped organize the United Nations Conference on Environment and Development.
In the 1990s, he contracted malaria while working for Greenpeace in Papua New Guinea.
The son of Australian citizens, he spent his childhood in Los Angeles, California; Sydney, Australia; and several European cities.
He assisted actress Cate Blanchett in bringing about the environmentally sound construction of the Sydney Theatre Company.