State of the environment in the region is generally dependent upon the anthropogenic pressure on nature and the response from the latter on this pressure. Agriculture and industry are responsible for atmosphere, and water pollution in the Lake Ladoga region.
Major source of atmosphere pollution in the region are various enterprises from metallurgic and chemical industries, as well as mining. In respect to air pollution the Leningrad region is the mostly affected area. Here carbon mononoxide (CO) dominates among pollutants (30%, 304 400 tonns per year). Another problem for the same territory is the dust content in the air (the data is available for the whole Leningrad region).
Surface water pollution is more pronounced in the Ladoga regions of Karelia, where organic compounds, oil products as well as nitrogen, copper and zinc are among dominated water pollutants. This type of pollution characterises the impact of paper industry and agriculture.
Major sources of agriculture and industry pollution in the Lake
Ladoga region are presented in the Fig.
1.2. Impact of various pollutants on certain components of biota of Lake
Ladoga and it's surroundings is further discussed in the sub-section
"Assessment of the state of ecosystem components".