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Reflections on the modern pioneers of the environmental movement.

Film-maker and campaigner Jack Harries considers the impact of James Lovelock, the creator of the influential Gaia theory which sees the earth as a self-regulating system.

Writer Emma Shortis profiles one of Greenpeace’s pioneer campaigners. Canadian David McTaggart sailed his yacht into the blast zone of French nuclear test areas, and later spear-headed the Rainbow Warrior’s activities against Norwegian seal culling and Japanese whaling.

World champion free-diver Tanya Streeter looks at the impact of French film-maker and under-water explorer Jacques Cousteau.

The man who defended Himalayan forests against the logging industry Sunderlal Bahaguna is profiled by former colleague Vandana Shiva.

Alice Bell of the climate change charity Possible makes a case for the inclusion of former Prime Minister Margaret Thatcher on the list of Green Originals.

Presenter: Peter Gibbs.
Producers: Natalie Steed, Dan Hardoon, Emma Barnaby, Emily Williams.
Series Editor: David Prest
A Whistledown production in association with The Open University.