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Some places still use rainwater as drinking water |
In the past, when scientific knowledge was not widely disseminated, people living in impoverished and backward areas believed that rainwater was the cleanest source of water. They would store rainwater for use, referring to it as “heaven’s water” or “immortal water.”
In reality, rainwater is not clean at all. When we look up at the sky, it may seem clear, but in fact, the atmosphere is filled with dust and a large number of bacteria. When rain falls, some of this dust and bacteria cling to the raindrops. In areas near large factories, the harmful smoke and gases released into the air make the rainwater even dirtier. Recently, due to the increasingly severe pollution of the Earth’s environment, rainwater has become even less clean. Not only is rainwater not as clean as river water, but it is also inferior to well water or groundwater.
Currently, many places use treated water, but in regions with particularly challenging conditions that are forced to rely on rainwater, it is essential to go through the process of sedimentation and filtration before boiling it for safe consumption.
