Geography of Uzbekistan Kazakhstan, also yielded about 60% of the total volume of Central Asia's emissions of harmful substances into the atmosphere. Because automobiles are relatively scarce, automotive exhaust is a problem only in Tashkent and Farghona. The reduction of water in Uzbekistan has resulted in soil degradation, and the spread of the salt from the evaporated Aral Sea has contaminated the surrounding soil. The soil has lost much of its water due to the increased surface irrigation. The irrigation of farmlands with water from the Aral Sea has resulted in increased salinization of the soil, causing the farmland to be less productive
Kazakhstan–Uzbekistan border tensions around the border – especially in the Tashkent area - in the late 1990s-early 2000s, with Kazakhstan accusing Uzbekistan of unilaterally demarcating and militarising the border; eventually in 2001 the two governments agreed to begin a full delimitation of the border. Full demarcation is currently ongoing. 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