fuels palivá 4 [vynechat] internal combustion engines 2 [vynechat] spaľovacie motory 2 [vynechat] automobiles 1 [vynechat] automobily 1 [vynechat] boilers 1 [vynechat] electric power plants 1 [vynechat] elektrárne 1 [vynechat] energia 1 [vynechat] energy 1 [vynechat] environmental pollution 1 [vynechat] heating 1 [vynechat] kotly 1 [vynechat] pohonné hmoty 1 [vynechat] propellants 1 [vynechat] tepelné elektrárne 1 [vynechat] thermal power plants 1 [vynechat] vykurovanie 1 [vynechat] vznetové motory 1 [vynechat] znečistenie životného prostredia 1 [vynechat]