RIYADH: The world is facing mounting challenges in the water sector, including rising drought rates that lead to multiple crises represented by a shortage of usable water, the exacerbation of desertification, and the subsequent threat to human life and societies, Crown Prince Mohammed bin Salman said on Tuesday. He was speaking while inaugurating the One Water Summit in Riyadh in the presence of several presidents and top officials, including French President Emmanuel Macron.