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Fertilizers and fish

03.02.2010

In the Mediterranean Sea, stocks of commercial fish species are falling. Only off the coast of Egypt, the fish became larger and more numerous. Studies have shown that the reason is in the Aswan power plant, built in 1955 with the help of the Soviet Union.

After the creation of the reservoir, the Nile floods stopped, which for centuries and millennia brought fruitful silt to the fields. Local farmers had to apply more fertilizer (up to 900 kg of nitrogen fertilizer per hectare). Water flowing from the fields carried fertilizer to the Nile, and from there to the sea. In addition, the population has grown, and sewage is often dumped into the river or directly into the sea without treatment.

As a result, phytoplankton flourished off the coast of Egypt, followed by microalgae-eating zooplankton and plankton-eating fish. Catches compared with 1955 increased three times.

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Many of the survivors of the catastrophic earthquake in 1999 in Turkey (7,4 on the Richter scale, thousands of deaths) still cannot come to their senses: they developed the so-called post-traumatic syndrome.

The victims do not find a place for themselves, do not sleep well, are afraid to stay indoors, and women who survived the earthquake are three times more likely than men to develop this nervous breakdown. Without treatment, only 10 percent of patients recover from such fears.

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