As irrigation and evaporation take their toll, prominent rivers are drying up, including the Colorado River in the western United States, the Yangtze in China, the Indus in Pakistan, the Ganges in India, and the Nile in Egypt.
Irigasi dan penguapan menyebabkan keringnya sungai - sungai terkenal, antara lain Sungai Kolorado di AS bagian barat, Sungai Yangtze di Cina, Sungai Indus di Pakistan, Sungai Gangga di India, dan Sungai Nil di Mesir.