Many countries and regions around the world frequently experience a shortage of water resource, and this has become an alarming issue as the global water demand rises. While there are several causes of the increasing water consumption, nations and citizens should take certain steps to tackle this issue. The surge of worldwide water consumption can be explained in a number of reasons. Firstly, population explosion is the major contributor to the growing water use. This, in particular, is severe in countries which could not manage the birth rate such as Africa. Secondly, as the global population rises, industries and factories have expanded their business to meet the consumption demand, discharging more sewage to natural resources, and eventually endangering water reverses. For example, in many developing countries, small farms still pump unprocessed wastewater directly into lakes, rivers, or oceans, which contaminate water reservoirs used for water production. National a...