...contrary to our primary goal of keeping material out of the landfill....

Yes, don't need CNG based garbage trucks. Need less garbage. A LOT LESS. Garbage is not an item of commerce, meaning the Commerce Clause does not apply. States should simply ban the incineration or landfilling of "trash". Eliminate trash. Easier said than done, but must be done.

cfm

It is hard to get economical progress by hitting the problem with the lawbook.

Over here in Sweden there has been a success with taxing landfills, it has mostly led to large scale garbage incineration that turns the waste into heat, chilling and electricity.
It has also somewhat helped the sorting of garbage usefull for  biogas production or reuse within he building industry and so on.

Our greens realy dont like this since the idea were that there would be no garbage and instead we have more then ever but soon very few new landfills. They are arguing for taxation on garbage incineration, I do not think this will work.

My guess is that we will have this garbage stream untill we hit a depression and people no longer can afford to buy as much new things and parts of the wastes turn valuble.

My recommendation is to in the meantime try to get misc products to contain less harmfull substances such as certain flamability inhibitors and become easier to burn and recycle.

Getting people to not make garbage is a loosing battle, try to get them to make better garbage instead.