| 摘要 |
A method and apparatus for display, having a tailpipe attachment piece, adapted for coupling to the exhaust pipe of a vehicle, a receiver piece coupled to the tailpipe attachment piece, wherein the receiver piece is adapted for coupling to a display piece. In one embodiment, a pollution detection device includes a tailpipe attachment piece, a receiver piece coupled to the tailpipe attachment piece, and a chemical indicator coupled to the receiver piece, wherein the chemical indicator is sensitive to the chemistry of emissions. In one embodiment, a method of presenting an advertisement message is provided by attaching the message to the exhaust pipe. |
