I’m sick of having to breathe the exhaust fumes from cars. Carbon dioxide is bad enough but particulates must surely be doing everyone immediate harm.
Today’s invention is an attempt to bring home to people the consequences of driving dirty vehicles.
It consists of a short, porous paper tube (made of eg coffee filter material) which can be placed over the end of a smoky exhaust pipe, without damaging the engine. The closed end of the tube can accommodate a cardboard disc. This disc can be pre-perforated by eg a knitting needle.
When this paper is eventually discovered by the driver of an offending vehicle, a message is highlighted on it by the preferential passage of soot through the piercings -just like the action of a can of spray paint used with a template.
This might say ‘Time for a service?’, ‘This is what you’re doing to my lungs’ or something more direct. I’d be particularly keen on attaching this to taxis which keep their engines running all day.