Walking down a damp Seattle street the other day, I was struck by the shimmer of motor oil on the street. Sure, it’s a lovely rainbow color, but the stuff is toxic, right?

I know cars get leaks, but at annual tailpipe emissions testing, they should sit your car on a platform for an hour, and if a substantial quantity of oil leaks, no emissions pass for you.

I don’t want it in my air, and I don’t want it in my soil or my water, either.