Fuel gasification process, due to proceeding high-temperature processes as well as the applied cleaning and processing of gas, enables the recovery and acquisition not only of heat but also of syngas and hydrogen for chemical and power industries, and it makes carbon dioxide separation and sequestration comparatively easy. The experiments carried out abroad indicate that through the right choice of gasifying reactor its charge can be composed not only of conventional fuels but also of biomass, refinery wastes, coal mining wastes, municipal refuse etc. Moreover, high temperatures enable the eliminated of hazardous waste. Solid wastes forming during the process, depending on gasification temperature, assume the shape of either bottom ash or slag. As a result of vitrification, slag, unlike bottom ash, is an ecologically neutral material with a considerable utilization potential, practically irrespective of gasified fuel. Solid and fluid impurities in gas, after their separation, are recycled to the reactor to be submitted to gasification process. Their mineral part is changed into slag, whereas sulfur components are reduced to sulfur and then, possibly, oxidized to sulfuric acid. Depending on an accepted processing model, there can be separated carbon dioxide and hydrogen from the synthesis gas. Heat recuperation from synthesis gas and from its combustion in gas-steam cycle results in high efficiency of the process and minimization of environmental pollution.