EN
A final energy consumption by sectors of Polish economy within the last 15 years has been presented. Intolerable for natural environment growing energy consumption is the cause of abrupt climatic changes on earth. Rapidly mounting concentration of greenhouse gases in the atmosphere leads to ever more numerous and dangerous natural disasters: draughts, torrential rains, floods, earthquakes and impetuous winds. They bring along enormous destruction on every continent. Wood, following its technological, structural and usable functions, may constitute energy source of small emissiveness. Also its by-products, useless for mechanical and chemical processing including those produced especially for heating purposes such as briquettes and pellet, should be used as fuels, first in households and subsequently in energy sector.