• Shallowing threatens Baikal. Because of the shortage of rainfall the water level, according to the forecasts, will reach the minimum level of 456 m by December 2015.

  • One of the sources of the Baltic Sea pollution is the garbage that is left on the banks by vacationers. Therefore each of us can contribute to the preservation of the sea.

  • Water in the Mediterranean Sea, surrounded on all sides by continents is renovated very slowly, this process takes from 80 to 90 years.

  • Only a small part of the basin of the Colorado River has remained virgin, but it may suffer from active development of territories.

  • In 2015, the Global Nature Fund (GNF) has recognized Lake Hovsgol as the most protection needed water reservoir in the world.

  • Nearly half of all sewage and waste production in the country falls into the Yangtze. The result is extreme eutrophication.

  • EU plans to further use of the Danube as the main traffic artery can lead to sad results.

  • The Nile can't provide water to residents of crowded areas. Over the years, the situation has been only getting worse.

  • Due to the lack of sewage systems in many regions wastewater get into the Ganges, so the river is dangerous even for bathing.

  • Using chicken manure as fertilizer could be the cause of appearing algae in the Yellow Sea.

SOS: Ten Reservoirs on the Verge of Catastrophe

Humanity is actively developing natural resources, and even the largest reservoirs of the planet are no longer able to resist the negative effects. Rivers, lakes and the sea, which we regard as world heritage, more and more often get into the alarm list of environmentalists. The first ten need help most of all.

1. Baikal. The oldest lake in the world, having 20% ​​of all the freshwater on the planet. Located in the central part of Eastern Siberia. Its length is 620 km, depth is about 1,700 meters. After closing the Baikal Pulp and Paper Mil in 2013, one of the main threats was eliminated. But there is another problem. Since 2011, more and more algae has been noticed on the bottom and on the banks of the lake. Tourism is among the main reasons as new resorts are drain into the lake untreated sewage and detergents containing nitrogen and phosphorus. In addition, private ships carrying tourists often drain directly overboard oily liquid, instead of taking them to the treatment plant in the port.

2. Baltic Sea. It washes the shores of Russia, Finland, Sweden, Germany, Denmark, Latvia, Lithuania, Poland and Estonia. Total area is 415 sq. km. Recognized as one of the most fragile ecosystems on the planet. Dozens of years of human activity have left their mark, and one of the main threats is eutrophication: today the Baltic contains 800% more phosphorus than 100 years ago. Sources of nitrogen and phosphorus are agriculture and untreated sewage. Among other dangers are oil spills, sewage from ships, marine debris, the introduction of alien species as a result of ships' ballast water discharge.

3. Mediterranean Sea. Situated between Europe, Africa and Asia. Area is 2500 thousand square. km. Those who spend a holiday on its beautiful beaches, are unlikely to think that this sea is threatened. Mass tourism has caused large-scale pollution. 80% of urban waste fall into the sea untreated. Agriculture is a source of pesticides, nitrates and phosphates. According to the World Wide Fund for Nature, 20% of the global traffic of oil tankers is in the Mediterranean Sea. Each year 635,000 tonnes of crude oil is spilled into its waters. Another problem is widely used fishing methods, including dynamite, bottom gear and drift nets. The last ones cause death of whales, dolphins and turtles.

4. Colorado. The river flows through the southwestern United States, including the Grand Canyon in Arizona, and northwest Mexico. Its length is 2334 km. Colorado is threatened by pollution of radiation from uranium mines, as well as the pumping of groundwater, which can lead to malnutrition. Ecosystem has been already seriously affected by the construction of dams, irrigation projects, pumping out water and invasive alien species. As a result, the population of several dozen species of fish greatly reduced.

5. Озеро Хубсугул. Озеро на севере Монголии, рядом с границей России, площадью 2 620 кв. км. Из него вытекает река Эгийн-Гол, которая впадает в Байкал через Селенгу. Хубсугул называют «Синей жемчужиной». В нем содержится 70% запасов пресной воды в стране, но уже в следующем десятилетии ситуация может измениться. Среди угроз – незаконный лов рыбы в коммерческих целях, загрязнение побережья, стоки из туристических кемпингов. Запланированное строительство трассы увеличит поток отдыхающих и усугубит положение.

5. Lake Khovsgol. Lake in the north of Mongolia, near the border with Russia, with an area of ​​square 2620. km. Eg River, which flows into Baikal through Selenga, flows from it. Hovsgol is called "blue pearl". It contains 70% of fresh water reserves in the country, but in the next decade the situation may change. Among the threats are illegal fishing for commercial purposes, coastal pollution, runoff from tourist campsites. The planned construction of the highway will increase the flow of tourists and aggravate the situation.

6. Yangtze. The river flows through the territory of China. It is about 6 300 km long. It is unreasonable planned hydrological and other projects that have changed its natural course, depleted biodiversity, destroyed ecosystems and forced many species to migrate. Yangtze problems are connected with the rapid economic growth and increasing population. They say that there was a time when the river was so clear that you could see how a thrown stone reaches the bottom. Now the water is so dirty that it can not be used for drinking.

7. Дунай. Вторая по величине река в Европе (после Волги). Ее длина – 2 860 км. Естественное течение Дуная не раз изменялось – для защиты от разливов, производства энергии, нужд сельского хозяйства и водного транспорта. Ради судоходства строятся каналы, с помощью вычерпывания песка и гравия углубляется русло. Все это привело к пересыханию болот и гибели лесов в бассейне реки. Проходящие корабли постоянно создают волны, которые вредны для молоди рыб и бентоса. В воду с судов сливается мазут и токсичные жидкости, содержащие кадмий, ртуть, пестициды, свинец.

7. Danube. The second largest river in Europe (after Volga). Its length is 2860 km. The natural course of Danube was many times changed for protection against spills, for energy production, agriculture and water transport. Channels are built for shipping, riverbed deepens by scooping sand and gravel. All this has led to the drying up of wetlands and destruction of forests in the basin. Passing ships are constantly creating waves that are harmful to young fish and benthos. Oil from ships and toxic liquids containing cadmium, mercury, pesticides, lead are drained into the water.

8. Nile. It flows in Africa, through Sudan, Ethiopia, Egypt, Uganda, Tanzania, Kenya, Rwanda and Eritrea. Length is 6 670 km. Irrigation areas need so much water that, despite the impressive size, in dry periods Nile does not reach the sea. Moreover, a huge amount of water evaporates because of the heat. These factors make the river extremely vulnerable to global climate change. Numerous dams and reservoirs also cause damage to the ecosystem.

9. Ganges. It flows through India and Bangladesh. Length is 2 700 km. This river is called both sacred river and one of the most polluted rivers in the world. This is due to the huge amounts of wastes that are dumped into the water by both enterprises and residents. In addition, sometimes the Indians send dead people to the last voyage, not burning them. Global warming will also have a negative impact on the fate of the Ganges, as it leads to the melting of Himalayan glaciers that feed the river during periods of drought.

10. Yellow Sea. Located near the east coast of Asia, its area is ​​416 thousand sq. km. The depth of the sea is only 60-80 m. Amazing creature inhabit it: dugongs, porpoises, sea turtles. However, industrial and agricultural runoff continues to negatively affect the ecosystem. The chemicals get into the water, including DDT, resins, heavy metals. Since 2008 The beaches of Qingdao, are regularly covered by a thick layer of green algae, and the water near the shore becomes like a carpet. Local residents got used to this phenomenon, and even continue to swim in the "flourishing" sea. But it is an alarming sign because marine inhabitants have not enough oxygen because of algae marine.

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