Chango's Tree Service

Chango's Tree Services advertises by putting plastic bags containing business cards and pebbles in driveways near the road.

It is understood that soliciting is legal, but throwing or placing plastic on the ground is littering, even if it is done in the name of advertising.

What happens when people don't pick up the "junk mail" thrown in their driveway? (I have observed that most people don't pick them up)

These bags become litter and because they are made of plastic this is a significant problem.

My intention is to politely ask this company to stop this form of advertising because it is a form of littering,

Or have a relevant authority speak to the company about their advertising practices,

Or if no such law exists to prohibit this form of solicitation, can we answer the question: why isn't there one?