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Слайд 4On 26 April 1986, at 01:23 , reactor four suffered a catastrophic
On 26 April 1986, at 01:23 , reactor four suffered a catastrophic
![On 26 April 1986, at 01:23 , reactor four suffered a catastrophic](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/1158710/slide-3.jpg)
power increase, leading to explosions in its core. This dispersed large quantities of radioactive fuel and core materials into the atmosphere[25]:73 and ignited the combustible graphite moderator. The burning graphite moderator increased the emission of radioactive particles, carried by the smoke, as the reactor had not been encased by any kind of hardcontainment vessel. The accident occurred during an experiment scheduled to test a potential safety emergency core cooling feature, which took place during a normal shutdown procedure.
Слайд 7Almost all surface waters of Ukraine belong to the Black Sea and
Almost all surface waters of Ukraine belong to the Black Sea and
![Almost all surface waters of Ukraine belong to the Black Sea and](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/1158710/slide-6.jpg)
the Sea of Azov basins. The high population density, heavy industrial development, and relatively low freshwater endowment of those basins, and the low governmental priority placed upon environmental protection until very recently, have given rise to chronic and serious levels of water pollution throughout Ukraine. The Dnister and the Danube are included among the most polluted bodies of water in the territory of the former Soviet Union. Hundreds of small rivers supply water for three-quarters of the villages and half of Ukraine's cities. Widespread fear is growing in Ukraine that a substantial fraction of those water arteries are so polluted as to pose fatal health risks to the people who depend on them. About half of the chemical fertilizers, herbicides and pesticides applied in the fields are washed off into rivers. Moreover, surface runoff from industrial territories is highly contaminated.
Слайд 9Protect your forest
Protect your forest
![Protect your forest](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/1158710/slide-8.jpg)
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Рациональные дроби. 8 класс