Geography of Kazakhstan the water in Kazakhstan is polluted by industrial effluents, pesticide and fertilizer residue, and, in some places, radioactive elements. The most visible damage has been to the Aral Sea, which as recently as the 1970s was larger than any of the Great Lakes of North America save Lake Superior. The sea began to shrink rapidly when sharply increased irrigation and other demands on the only significant tributaries, the Syr Darya and the Amu Darya (the latter reaching the Aral from neighboring Uzbekistan), all but eliminated inflow. During the Soviet Era, Kazakhstan received water from Tajikistan and Kyrgyzstan, and Uzbekistan, Turkmenistan,
History of Kazakhstan numeracy of Kazakhs was still higher than other Central Asian nations, which are nowadays referred to as Kyrgyzstan, Turkmenistan and Uzbekistan. There could be several reasons for this striking early numeracy level. First and foremost, the settler share could explain part of this, albeit Russians were a minority in the Kazakh steppe. Secondly, the relatively good nutritional situation in Kazakhstan. Protein malnutrition that plagued many other populations of Central Asian nations was absent in Kazakhstan. Moreover, Russian settlers of the 1870s and 1880s might have simulated so-called contact learning. Kazakhs started to invest more in human capital because they observed