Environmental issues in Kazakhstan at the Semipalatinsk nuclear testing facility (in fact a large zone south of Kourchatov (Курчатов)) and along the Chinese border. The Central Asian Regional Environmental Center is located in Kazakhstan, which fosters regional cooperation on environmental issues. Most of Kazakhstan’s water supply has been polluted by industrial and agricultural runoff and, in some places, radioactivity. The Aral Sea, which is shared with Uzbekistan, has shrunk to three separate bodies of water because of water drawdowns in its tributary rivers. A Soviet-era biological weapons site is a threat because it is located on a former island in the Aral Sea that
Kazakhstan–Uzbekistan border Kazakhstan–Uzbekistan border The Kazakhstan-Uzbekistan border is 2,330 km (1,448 mi) long and runs from the tripoint with Turkmenistan to the tripoint with Kyrgyzstan. It is Uzbekistan’s longest external boundary. The Uzbek capital Tashkent is situated just 13 km (8 mi) from this border. The border begins in the west at the tripoint with Turkmenistan; it then follows the 56th meridian east for about 410 km (255 mi) up to the 45th parallel north, where a straight line of 213 km (133 mi) then goes north-east, followed by another straight line section of 128 km (80 mi) going south-east. This latter