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每年的3月22日是世界水日,根据联合国的发展报告,世界水资源短缺将会变得越来越严重。人口不断增长,人类对粮食的需求上升,城市化的步伐加快,都使人类对水的需求日益增加。目前20％的世界人口面临水资源短缺问题,预计到2025年,这个数字还将增加30％。水源短缺给人类带来严重后果,据估计,世界上每8分钟就有一名儿童死亡于饮用水不卫生所引发的疾病,这些疾病包括霍乱、登革热等。预计到2025年,世界上无法获得安全饮用水的人数将增加到23亿,而由饮用水不卫生致死的人数将大大超过目前的每年530万。实际上,世界水资源短缺很大程度是由于不合理和没有有效地利用水资源和环境污染造成的。
March 22 each year is World Water Day, according to the United Nations development report, the world’s water shortages will become more and more serious. The growing population, rising human demand for food and accelerating urbanization have all contributed to increasing human demand for water. Currently, 20% of the world’s population faces the problem of water shortage and it is estimated that by 2025 this figure will increase by 30%. The water shortage has serious consequences for humanity. It is estimated that every 8 minutes in the world one child dies of ill-health caused by drinking-water diseases, including cholera and dengue fever. It is estimated that by 2025, the number of people in the world without access to safe drinking water will rise to 2.3 billion, while the number of unhygienic to drinking-water people will greatly exceed the current annual rate of 5.3 million. In fact, the world’s water shortage is largely due to irrational and ineffective use of water resources and environmental pollution.