Reason for appearance of water in atmosphere of Earth, its energy, effect on heating of water synthesis and contribution to the greenhouse effect are considered. The existing methods of obtaining additional electrical, thermal and mechanical energy due to shock, swirling, electrohydraulic, cavitation effects or their combined effect due to the extraction of energy from the space vacuum are analyzed. Other methods of obtaining energy from the space vacuum are described, in particular using piezoelectric effect. The existing theories of the universe are analyzed and the data of the newly developed theory of superstrong electromagnetic interaction (SSEI), which has appeared recently, is presented.