Plastic burns... and quite hot, too.
I an older than I care to remember. There is plastic (milk jugs & remember the old Vac-U-Form toy? It was one of my favorite Christmas toys from Santa back in the day). And there is PLASTIC which is used in many heavy duty production of things such as plumbing, construction, faux wood flooring, laminated tiling, siding to name a few with a good dose of chemical which are toxic when released into atmosphere.
Hate getting old.