Same way you get rid of witches.
This was good but shouldn't we have the scene about the "shrubbery"?
Same way you get rid of witches.
Toxicity for fairly benign stuff isn't really an issue, I would imagine. Most major incinerators are going to need filters for the normal toxic stuff regardless. Water, however (which most people's grass, sticks, logs etc are loaded with) could seriously cut into whatever efficiency is required for their incinerator to function properly.
Now for that low a fee I wouldn't (theoretically of course) have to do pre-dawn dumpster missions.
We also have a city facility that charges $5 per pickup load. The trash must be burnable (mattresses are accepted for example) and it goes into the city incinerator and is used to supplement power generation (I think - not positive). Oddly enough, they won't accept branches and sticks or any kind of yard waste - you know, "natural" combustibles, but they gladly accept things which no doubt create toxic fumes (like mattresses).