well it just means that if you don't pollute right or you pollute very little you don't have to pay any tax or you just buy one of these things and it it um i mean you could you could probably devise them so that it slowly closed off your tail pipe and uh the less you pollute the longer the device lasts and if you pollute a lot then it closed off your tailpipe and you couldn't start your car anymore
If you don't pollute much the device will last longer.