[Synaesthesia]

A lot of plastics are incinerated. I think it has to be at a high temperature. Of course this does emit carbon dioxide.

[zdragnar]

The temperature at which burning polymers completely eliminates particulates and CO is very close to the temperature that NOx starts to form.

Source: I did a bunch of research on rocket mass heaters (think rocket stove, not missile engine) when I built one.