Technogenic impact of rocket and space activities on the environment is one of the actual problems of practical cosmonautics. This applies not only to pollution of near Earth space a long man-made space debris (spent upper stages of space launch vehicle (SLV)), but the need for of alienation of significant area on the surface of the Earth fall areas for lower spent stages of SLV. The use of liquid rocket engines SLV additionally exacerbates this problem due to the presence of unused liquid of residual propellants in the tanks of the stages of SLV, which can lead to:  explosion on the orbits of the upper spent stages, which leads to an increase of space debris in near-Earth space;  increased probability of explosion for spent lower stages when moving in the dense atmosphere layers, that requires an expansion of areas of the permitted fall region.  chemical contamination of the soil and water as well as a high probability of fires occurrence in the taiga fall regions. In OmSTU and IPCP it was suggested to apply on board of the stages of SLV compositions, generating hot gases for evaporation of unused residues of liquid propellant in tanks of SLV and their subsequent use as propellant mixture for autonomous gas rocket engine. It was proposed to apply different self-burning gas generating compositions (GGC) for gasification kerosene and liquid oxygen. GGC for liquid oxygen gasification have not contain in the combustion products any gases besides oxygen and nitrogen. On the other hand, GGC for kerosene gasification have not contain their active oxidizers (halogens, nitrogen oxides, oxygen). It was showed that an ordinary gun powder is the best GGC for kerosene. For liquid oxygen gasification a few systems like the following have been considered - 64.7% NaN3 + 35.3% KMnO4; 78% NaClO3 + 7% BaO2 +4% SiO2 + 9.5% Fe + 1.5% Mg etc. Such a solution would decrease considerably the level of the environment pollution and additionally it increases energetic characteristics of SLV, for example in the case of the second stage of SLV "Soyuz-2.1. v" it increases the total velocity in 5%.