GTR and Perpetuum Mobile Rehabilitation

First of all, the author solemnly declares that he recognizes the energy conservation law (understanding, however, that it will not help). Next we shall show that this law does not contradict the possibility of building a perpetual motion machine that uses the force of gravity. This, of course, reduces the kinetic energy of the Earth, but the author ignores this problem (in the same way as it is ignored by the designers of hydropower plants).