Main problems, that may arise at complete or partial refusal to usehydrocarbon systems and desire to reduce of «carbon footprint» or achieve of carbon neutrality of energy and resources supply are considered. Negative consequences of transition to green energy using solar thermal, wind and hydro energy are listed.High cost of materials used for this and their utilization after use, high cost of maintenance, energy intensity, significant carbon footprint in equipment manufacturing, and dependence on various natural factors (seasonality, water availability) make «green transition» plans overly optimistic. As part of the evolving conceptdeep abiogenic origin of hydrocarbon systems and the conclusion that follows from thisreproducibility and inexhaustibility of their reserves data on possible sources of oil and coal systems and ways of their formation are presented. A comparison of the compositions of oils and coals was carried out.