Chia Cars!

RAY: Now here's the answer. The automobile executive who proposed a biodegradable car made of soybean plastic was...

TOM: The suspense is killing me!

RAY: Henry Ford. Back in 1941, he unveiled a prototype of an ecologically friendly car, complete with tires made from goldenrod. Can you imagine that? Cars made from plants?

TOM: I got to get some of those growing in my garden!

[ Car Talk Puzzler ]