The various plastics wastes were combusted in air at 850-950 degrees C in a lab. reactor with a fluidized bed of glass-making sand (0.385-0.43 mm in grain size) to study the compn. of flue gases. The N2O and NOx contents in the gases decreased with increasing combustion temp. Formation of N2O was obsd. only during combustion of N-contg. plastics. The highest CO and MeH contents were found in the flue gas from styrene combustion.