Agricultural residues 1 Agricultural wastes 1 Agriculture 1 Air pollution 1 Biological materials 1 Biomass 1 Biomass sources Boiler firing 1 Carbon monoxide 1 Carbon monoxide emissions 1 Coal 1 Coal combustion 1 Coal fired boilers 1 Coal industry 1 Coal research 1 Cobalt 1 Cobalt compounds 1 Combustion 1 Combustion efficiencies 1 Combustors 1 Conservation of Energy Resources 1 Energy conversion 1 Excess airs 1 Fired boilers 1 Fluidised beds 1 Fluidization 1 Fluidized beds 1 Incineration 1 Industrial Waste 1 Palm kernels 1