Meet Dr Patrick Moore: a true environmentalist, climate change realist, and co-founder of Greenpeace who walked away after its hijacking by the politi..

Dr Patrick Moore, the co-founder of Greenpeace, shares how he came to join the fledgling group that founded Greenpeace, the bold endeavours and significant victories obtained by the young organisation during its early years, and the details behind his decision to walk away from the organisation after 15 years of devoted involvement. Moore's comprehensive understanding of the geologic time scale – the "calendar" for events in Earth's history – is extraordinary, allowing him to contextualise climate change, CO2 concentrations in the atmosphere and extreme weather events, among others, in a way that is brilliant yet simple enough for the layman to understand. A true environmentalist, Moore is a rare example of someone who placed his principles above all else. Learn more about your ad choices. Visit megaphone.fm/adchoices