The article deals with the improvement of air quality in the environment through the use of self-cleaning building materials. The photocatalysis process is analyzed. Examples of realized objects with self-cleaning materials are given.

Keywords: urban pollution, air purification, self-cleaning building materials, photocatalysis, photocatalytic reactions, self-washing

The article considers the problems of sufficient natural light` provision of premises with roof natural lighting system in winter climate conditions of Russian Federation. It is noted, that contemporary Codes and Regulations on Natural Lighting don`t consider an effect of snow deposits on roof skylights on the values of daylight factor (D.F.) in interiors.Snow deposits on Building roofs is a characteristic feature for a winter months in climate conditions of major part of Russian Federation, thus making the investigations considered very actual. The article contents the results of site investigations, as well as results of the oretical calculations on the problem in question.

Keywords: Snow deposits, daylight factor, a system of roof natural lighting, skylights.

The article considers the problems of sufficient natural light` provision of required levels of narural illumination in premises with natural light system in form of roof skylights. The influenoe of snow deposits on roofs and skylights on light penetration through the glazin a of these elements with respect to snow`pollution is being considered. The latter factor, due to general pollution of air masses becomes very important and characteristic to the large cities of our country` conditions. This makes the problem in question very actual. The results of field studies, general conclusions and recomendations are being quoted.

Keywords: snow deposits, snow pollution, light penetration of roof lights system of roof natural light, climate conditions

In this article is reviewed the nature of organic hybrid nanocomposites. Promising directions in the field of organic hybrid nanocomposite materials will be methods for the synthesis of multicomponent materials, as well as the type of "net net" and "host-guest". The fundamental problem with the chemistry and physics of nanocomposites is dependent "structure-property". Solving this problem will move from research materials to their purposeful design.

Keywords: nanocomposite sol-gel technology, synthesis, nanoparticles.