Why did the government suppress a report written by senior intelligence officials which named climate and nature collapse as a national security threat? How could ecosystem collapse lead to empty super market shelves, water scarcity and increased risk of conflict? And, ultimately, why has this not become a bigger conversation among politicians?

Sign up here to watch the whole episode and the rest of the series as it drops.

Join Caroline Lucas, former leader of The Green Party, as she speaks with senior British army officer, Lt General Richard Nugee and former British diplomat and security expert Arthur Snell.

Read the redacted Joint Intelligence Committee Report here

Find out more about the National Emergency Briefing here.

Find Arthur Snell's new book Elemental here

Producer: India Dunkley

Video Editor: Josh Smith

Social Producer: Celine Charles

Trailer Editor: Dylan Bonham

General Manager: Tom Whiter

Learn more about your ad choices. Visit podcastchoices.com/adchoices