I thought I’d share a handy link that seems to be unknown by most members of the community. Queensland Transport allows people to report vehicles that are producing excessive amounts of smoke into the air.
Simply go to this section of the Queensland Transport website and enter the licence plate of the car/truck, along with other details such as the date and time seen and a description of the vehicle. It helps to jot down these details onto a notepad/into a text message at the time that you spot the vehicle.
I’m sure other states and countries have similar schemes. It is a simple and easy way to force inefficient, polluting vehicles off the road and into the mechanic’s garage for a tune-up.