Kenzie's Korner: Catalytic converters in cows' butts (01:54)

Jim Kenzie has always been known as a defender of all things good when it comes to the automobile.

He also understands the importance of clean air.

But when governments and environmentalists put the automobile, emitter of only 12 per cent of global greenhouse gases, on blast, you can bet Jim will be there to defend it.

This segment originally appeared on Episode 2 of Motoring 2015.