Natural and technogeneous contamination of near-Earth space

The paper presents an analysis of ecological impact of the combined factor of natural and manmade contamination of near-Earth space on the environment around the Earth and human space activities. The near-Earth space (NES) is considered here as the enlarged notion by uniting the traditional cosmic space starting conditionally from about 100 km and the lower space filled with atmosphere. This makes analysis of some important characteristics (such as, for example, the astronomic transparency of the environment) more comprehensive and allows one evaluating those characteristics from one and the same position.