Water is life. We can survive without food for a long time, but without water, we will die in a few days.
The oceans contain about 97 percent of the earth's water, but that isn't drinkable. About 2 percent is frozen at the poles or in glaciers. Of the remaining 1 percent, almost all of it (about 96 percent) is groundwater, according to the National Oceanic and Atmospheric Administration (NOAA). The rest of our freshwater is found at the surface in streams, lakes, rivers and wetlands.
We drink only about 1 percent of the water we consume each day and use the other 99 percent (about 250 liters a day) to feed things like baths, showers, washing machines, lawn and garden sprinklers, hosepipes for washing cars and flush toilets. Clothes washing machine can easily use over 100 liters in an hour by repeatedly rinsing your laundry to remove detergent. Lots of products we'd never normally associate with water consume vast amounts of the precious liquid during their manufacture. For example, about 570 liters of water is used making a thick newspaper.
Importance of a tree:
Trees play a key role in attracting clouds, therefore, clouds can stop and trees can capture rainwater and reduce the danger of natural disasters like floods and landslides. Their complex root organizations act like filters; removing pollutants and slowing down the water’s absorption into the ground. This process prevents harmful waterside erosion and reduces the risk of over-saturation and flooding.
The tree also add its minerals in rainwater and that water mixed with other 'added minerals by nature' will reach to recharge the groundwater.
According to the Food and Agriculture Association of the United Nations, a mature evergreen tree can intercept more than 15,000 liters of water every year.