In the article, the aims of teaching bioscience in primary and middle school have been introduced. Core curriculum has been mentioned as well, and the tools that may be used by a teacher to convey theory and practical knowledge in the most efficient way  have been discussed. Furthermore, it has been noticed that various ecological ventures have a positive impact on children's ecological awareness. In the second part of the article, results of surveys conducted among primary and middle school students have been introduced. It embraces also questions and answers, in which children describe their knowledge level about the condition of environment and talk about their attitude towards taking care of nature, and what are the stimuli of such demeanours. In addition, the task of surveys was to find out which issues teachers pay particular attention to. The last two questions were to check the knowledge.

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Abstract. In the first part of the article were presented the technical possibilities of obtaining solid biomass, biogas, landfill gas, a biogas from wastewater treatment plants, bioethanol and biodiesel. Then processes was described, allowing use of energy from biomass. As first was discussed the incineration which includes drying and degassing of the wood materials, wood gas burning at 1200 0 C, post-combustion gas and heat transfer in the heat exchanger. Then had been described gasification, or thermochemical conversion process, occurring at high temperature. It is two-stage process. In the first chamber at deficiency of air and at relatively low temperatures (450-800 0 C), the fuel is being degasified, resulting in creating combustible gas and a mineral residue (charcoal). In the second stage, secondary combustion chamber and at a temperature of about 1000-1200 0 C and in the presence of excess of oxygen resultant gas is burned. A further process is pyrolysis. It consists of the steps of drying fuel to a moisture level below 10%, milling the biomass into very small particles, the pyrolysis reaction, separation of solid products, cooling and collecting bio-oil. Then discusses co-generation, which is combined production of heat and electricity. In this situation where the biomass contains too much water it can be used for energy purposes through biochemical processes. The alcoholic fermentation results in decomposition of carbohydrates taking place under anaerobic conditions, and the product is bioethanol. Another biochemical process used for the production of liquid biofuels is esterification of vegetable oils. Methane fermentation in turn causes a decomposition of macromolecular organic substances with limited oxygen available. As a result, we obtain alcohols, lower organic acids, methane, carbon dioxide and water. There was analysis of economic increasing of solid biomass energy, biogas and liquid biofuels in the following article.

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