To reach climate neutrality in 2050 it will be necessary to change the attitude towards sustainable use of available biomass resources. However, the question of what will replace the use of biomass for the energy sector remains open. Despite the significant progress that has been made towards decarbonizing the power sector in recent years, the question of what will replace the use of biomass for energy generation remains open. The development of agriculture and forestry is changing, and it is increasingly moving towards carbon farming. Current issues are not only the use of biomass to produce products with high added value but also the improvement of biogas and its quality to produce biomethane, n-butanol and biobutanol with the integration of renewable solar and wind energy resources to produce hydrogen. Another development direction of carbon farming is related to the gradual introduction of agricultural symbiosis. At the same time, the problems of LULUCF sector decarbonization and carbon storage in the soil are relevant. This will significantly affect the development of district heating systems, in which the proportion of renewable energy resource - biomass use is relatively high. It is also important to emphasize the reduction of the proportion of individual heat energy users, integrating them into the concept of energy communities. Four different scenarios of heat supply development were analyzed with the help of the system dynamics model so that two different sectors and the national economy could develop towards achieving the goals of climate neutrality.