If burning plastics is exothermic, with hot plastic and a intake of relatively cold air (oxygen). Maybe to balance temperature charges, we need cold plastic and hot intake of air. This is consistent with a landfill of plastics where the lower layers of the fill, at great depth, become brittle and decompose. This layer is cold and the air drawn in through ventilation pipes is relatively hot.
So, freeze plastics in the open and subject it a hot stream of air. Is the decomposition obvious? Is methane detectable? Maybe, dry air, without moisture would reduce methane emission?
Goodnight...
