Earth Day

So, for those of you who don't know, today is Earth Day. We got to Virginia late last night, and put the kids to bed. When we woke up this morning, I was trying to explain to C that the trash can in the kitchen was for recycled items, not for trash. His response was, "So that means we put things in there that have a triangle and a number on it, right?"
Where does he come up with this stuff?
In honor of Earth day today, please recycle all of those things that have a triangle and a number on them.