A gift from a friend, which I'm taping to the inside of back window, since I already have a "CZ" sticker and a peace symbol sticker to remove, before I sell (or give away) my car, en route to grad school....

WARNING: This vehicle emits carbon dioxide, carbon monoxide, nitrogen oxides, sulphur dioxide, hydrocarbons, benzene, methane, aldehydes and VOCs.  Causes respiratory disease, cancer, death and ecocide. ESPECIALLY HARMFUL TO OTHER SPECIES AND CHILDREN.