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 Farm Country Park Lake Farm Country Park Lake Farm Country Park is an expanse of green belt land approximately 60 acres in size fringed by trees and the Grand Union Canal, situated in the south of Hayes in the London Borough of Hillingdon. Its formal status as a country park dates back to September 2002. In 2014 an area of the park was developed as an academy school by Hillingdon Council. The development was controversial, since the site was classed as green-belt land, and several protests were held against the plans. Despite opposition, the application was approved in 2013, and construction continued throughout