The sign on the back of the Tri Met bus reads "Become a Green Street Steward!" Thinking this might be another Randy Leonard spy on your neighbor program, I looked into it. It's nothing quite so nefarious.
The City planning poohbahs would like you to pull their weeds on their on their bioswales, street planters and all the other stuff they install to slow down cars. It's Orwellian name is: Green Streets.
You can't plant anything, but you can pull the weeds. You have to be, uh, trained. Are we paying for the Weed Pulling Trainer?