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,
Foreign relations of Uzbekistan Azerbaijan and Moldova), which was formed in 1997 (temporarily making it GUUAM until Uzbekistan withdrew in 2005). Uzbekistan is also a member of the Shanghai Cooperation Organisation (SCO) and hosts the SCO’s Regional Anti-Terrorist Structure (RATS) in Tashkent. Uzbekistan also joined the new Central Asian Cooperation Organization (CACO) in 2002. The CACO consists of Uzbekistan, Tajikistan, Kazakhstan, and Kyrgyzstan. It is a founding member of and remains involved in the Central Asian Union, formed with Kazakhstan and Kyrgyzstan, joined in March 1998 by Tajikistan. Antti Turunen, the head of the Finnish Foreign Ministry's Eastern European and Central Asian department, led