A thesis on a topic Using mycorestoration for ecological sanitation of ash describes a possible use of modest wood-decaying fungi for the ecological sanitation of ash. It points at history of using the fungi for benefit of mankind. It also approaches chemical composition of heating plant ash. It presents the possibility of the fungi being used as ways and means to degrade complete toxic substances contained in heating plant ash, the use of the fungi for production of mycofilter, comparing different production strains of oyster mushroom and analyses a cultivation of more procedures on various of substrates and their comparison.