Geography of Uzbekistan in Uzbekistan is best exemplified by the catastrophe of the Aral Sea. Because of diversion of the Amu Darya and Syr Darya for cotton cultivation and other purposes, what once was the world's fourth largest inland sea has shrunk in the past thirty years to only about one-third of its 1960 volume and less than half its 1960 geographical size. The desiccation and salinization of the lake have caused extensive storms of salt and dust from the sea's dried bottom, wreaking havoc on the region's agriculture and ecosystems and on the population's health. Desertification has led to the large-scale loss
Science and technology in Uzbekistan 14.1 "Note: PhD graduates in science cover life sciences, physical sciences, mathematics and statistics, and computing; PhDs in engineering also cover manufacturing and construction. For Central Asia, the generic term of PhD also encompasses Candidate of Science and Doctor of Science degrees. Data are unavailable for Turkmenistan." In 2014, Uzbekistan had a population of 29.3 million, compared to 16.6 million for Kazakhstan. The two most populous countries of Central Asia logically count the most researchers: just over 30 000 for Uzbekistan and 17 000 for Kazakhstan (in head counts), compared to a little over 2 000 for each of Kyrgyzstan