combustion biomass 41 simulation and modelling 40 fuels (chemistry) 18 combustion physics 17 air pollution 14 wastes 13 more ... issues 12 steam boilers 11 internal combustion motors 11 fluid boilers 10 optimization 10 combustion products 10 imissions 9 waste disposal services 9 heating 9 biofuels 8 power engineering 8 physical chemistry 8 carbon dioxide 8 mechanical engineering 8 pyrolysis 7 solid fuel boilers 6 heat-generating plants 6 thermodynamics 6 environmental pollution 6 brown coal 5 boilers 5 machines 5 chemical kinetics 4 less ...