As far as the environment of Estonia is concerned, there have been air polluted with sulfur dioxide from oil-shale burning power plants in northeast; however, the amounts of pollutants emitted into the air have fallen dramatically and the pollution load of wastewater at purification plants has decreased substantially due to improved technology and environmental monitoring; Estonia has more than 1,400 natural and manmade lakes, the smaller of which in agricultural areas need to be monitored; coastal seawater is polluted in certain locations. As for nvironment - international agreements, we have; Air Pollution, Air Pollution-Heavy Metals, Air Pollution-Nitrogen Oxides, Air Pollution-Persistent Organic Pollutants, Air Pollution-Sulphur 85, Air Pollution-Volatile Organic Compounds, Antarctic Treaty, Biodiversity, Climate Change, Climate Change-Kyoto Protocol, Climate Change-Paris Agreement, Comprehensive Nuclear Test Ban, Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Marine Dumping-London Protocol, Ozone Layer Protection, Ship Pollution, Tropical Timber 2006, Wetlands, Whaling.