“ More than half the world’s major rivers are going dry or are polluted, ” reports the newspaper USA Today. Many waterways have been “seriously depleted and polluted ” from overuse and misuse of land and water, says the World Commission on Water for the 21st Century.
მეორე მხრივ, გუნდაობა არ წარმოადგენს სამუშაოს და ნებადართულია.