Numerous archaeological monuments of the X-XI centuries testify that already by the time of formation of the city, at the initial stage of moving of Slavs, the Territory of modern Moscow was quite densely populated. It was promoted by an advantageous geographical position, a favorable environment and rich natural resources.
In general machine-building and metal-working industry of the region (including a huge number of the defensive and scientific and experimental enterprises) on a variety of branches of productions, the consumed metals and materials and on the negative impact on environment has not equal in other regions of the country.
Owing to the strengthened heating of the territory it is proud in the summer over it the powerful ascending streams of warm air are observed. As a result are intensively formed cumulus and cumulus cumulonimbus clouds. Therefore the quantity of summer heavy rains in general over Moscow is increased by 9 - 27%, and number of thunder-storms - the doge for 47%. They are formed also in the winter over high chimneys of the combined heat and power plant and plants releasing into the atmosphere heated air with high content of pollution - condensation kernels. At its cooling cumulus clouds which it is possible to see in various parts of the city in clear frosty day are formed.
The atmosphere is the most dynamic, mobile component of environment therefore the first accepts all polluting substances and impurity emitted by the industrial enterprises, transport, power objects, agriculture etc. The qualitative composition of atmospheric air makes direct, direct impact on health of the person and activity of the nature.
The main pollutants of air in agriculture are livestock and poultry-farming farms and complexes, the enterprises for preprocessing of agricultural production, and also the pesticides used on fields (in particular disseminated about air and in special warehouses where they pickle seeds before crops.
Heat supply facilities make an essential contribution to pollution of an urban environment. It should be noted, however, that the favorable structure of fuel and energy balance promotes preservation of quality of the air basin of the city.
Sewer waters pass cleaning at stations of aeration and factory stations of sewage treatment. But also large number of pollutants as a result of a superficial drain from city streets gets to the river. These drains are formed due to thawing of snow, rain and irrigation and washing waters. Street drains so far are not cleared in any way and bear a lot of dirt to the Moskva River. For this reason the river in the city, and especially in its lower current, is very strongly polluted.
Everyone their these substances has quite wide range of impact on an organism of people, on plants and animals. If heavy metals and firm particles due to atmospheric processes quickly get to other environments, gaseous emissions are present at the atmosphere constantly.
The sewer network according to the main features of a relief of the city of Moscow has the general direction of a bias on the South and the southeast to the area of the lower Moskva River Current. The largest station of aeration is Kuryanovskaya where nearly 56% of all sewage of the city (on Lyubertsy - 37 arrive; and Lublin - 7%). At 846 enterprises of the city there are own treatment facilities, other enterprises dump the industrial drains in the city sewerage.