Lake Onega water per year, of which 46% are industrial and household water, 25% is stormwater runoff and 16% is melioration-related drainage. This drainage contains of phosphorus and of nitrogen; respectively of these elements are removed through the River Svir whereas the rest accumulates in the lake. Ships and motor boats (about 8,000 units) bring oil pollution at the level of about per navigation year, as well as phenols (), lead () and oxides of sulfur, nitrogen, and carbon. The lake basin is a major source of granite, marble and black schist in Russia which have been exploited in the area since
Lake Forest Country Day School Lake Forest Country Day School Lake Forest Country Day School (LFCDS), founded in 1888, is a coeducational, independent preK-8 school located on a 29-acre campus in Lake Forest, Illinois, USA, a suburb approximately 30 miles north of Chicago. The School serves families from more than 34 communities. The School is affiliated with the Country Day School movement and is a member of The National Association of Independent Schools, The Independent Schools Association of the Central States, The Lake Michigan Association of Independent Schools and The Secondary School Admission Testing Board. The school has just recently added a new House System.