In 2014, ten monkeys were watching cartoons in a sealed chamber, into which ACTUAL SCIENTISTS pumped exhaust fumes from a VW Beetle. For four hours.

Why? Who was behind it? And why did people get so much more upset about the gassed monkeys than about the hundreds of thousands of people dying early 'cos of diesel fumes?

We delve deep to find out, trying to avoid being sued by evil car companies as we go.

Sustainababble is your friendly environment podcast, out weekly. Theme music by the legendary Dicky Moore – @dickymoo. Sustainababble logo by the splendid Arthur Stovell.

Available on iTunes, Acast, Soundcloud & all those types of things, or at sustainababble.fish. Visit us at @thebabblewagon and at Facebook.com/sustainababble. Email us at hello@sustainababble.fish.