Water is one of the most important natural resources. With the rising population there has been an increasing pressure on this earth's resource. Scarcity of water has been felt throughout the country. Efforts have been made to collect water by building dams. Wells have also been dug to create ground water structure. But this is not enough. Wise conservation of water is needed. One of the most popular ways of conservation is rainwater harvesting. It means collecting rainwater on the roofs of buildings and storing it underground for later use. This method can raise the level of ground water and also increase water supply. Another method is waste water harvesting. Water from kitchens and bathrooms is collected and cleaned. It can then be used for purposes other than drinking.
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Water scarcity (water stress or water crisis) is the lack of fresh water resources to meet the standard water demand. Humanity is facing a water crisis, due to unequal distribution (exacerbated by climate change) resulting in some very wet and some very dry geographic locations, plus a sharp rise in global freshwater demand in recent decades driven by industry. Water scarcity can also be caused by droughts, lack of rainfall, or pollution. This was listed in 2019 by the World Economic Forum as one of the largest global risks in terms of potential impact over the next decade.[1]
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