Around 50 years ago, the common perception was that water is an infinite resource. At that time, there was less than half the current number of people on this planet. Earlier, people consumed fewer calories and ate less meat, so less water was needed to produce their food. They required a third of the volume of water we presently take from rivers due to change in our lifestyle. Today, the competition for water resources is much more intense. This is because there are now seven billion people on the planet, there is increased consumption of water-thirsty meat, and urbanisation바카라 웹사이트has taken place. In future, even more water will be needed to produce food because Earth's population is forecasted to rise to 9 billion by 2050.
97% of the water on Earth is salt water and only three percent is바카라 웹사이트fresh water; slightly over two-thirds of this is frozen in바카라 웹사이트glaciers바카라 웹사이트and바카라 웹사이트polar바카라 웹사이트ice caps.바카라 웹사이트The remaining unfrozen fresh water is found mainly as groundwater, with only a small fraction present above the ground or in the air.
Fresh water is a바카라 웹사이트renewable resource, yet the world's supply of바카라 웹사이트groundwater바카라 웹사이트is steadily decreasing, with depletion occurring most prominently in Asia, South America and North America, although it is still unclear how much natural renewal balances this usage, and whether바카라 웹사이트ecosystems바카라 웹사이트are threatened.
In the present scenario of Covid-19 pandemic, it is advised that people wash hands frequently with soap and water for at least 20 seconds. The hydrophobic tails of the free-floating soap molecules attempt to evade water; in the process, they wedge themselves into the lipid envelopes of certain microbes and viruses, prying them apart. That's an effective way to eliminate viral particles on your hands. This바카라 웹사이트is one of the best possible ways to remove the novel coronavirus (SARS-CoV-2) and in turn, keep a check on the global disease outbreak.바카라 웹사이트
A proper hand wash involves lathering soap and scrubbing hands on both sides for at least 20 seconds, according to the WHO guidelines. A바카라 웹사이트running tap바카라 웹사이트uses 6 litres of바카라 웹사이트water per바카라 웹사이트minute. A 30-40 second hand wash would use up to around four litres of water if the tap is on, or two litres with the tap closed, while scrubbing with soap.바카라 웹사이트A family of five members would thus need 100 to 200 litres of water per day only to wash hands 10 times a day than 4-5 times as usual. But for the 2.2 billion people바카라 웹사이트in the world who lack safe drinking water — mostly in low- and middle-income countries — that advice will be difficult to heed.바카라 웹사이트One gallon contains roughly 3,785 ml, so that's 15,140바카라 웹사이트drips per바카라 웹사이트gallon, which means our 1-second-dripping faucet wastes바카라 웹사이트over 5 gallons of바카라 웹사이트water per day바카라 웹사이트and just less than 2,083 gallons바카라 웹사이트per바카라 웹사이트year. Frequently washing hands also may cause wastage of water.
So how to avoid water woes in the time of such pandemic? Sensor taps should be promoted for use to reduce wastage of water while washing hands. The earth will be overburdened with waste water leading to eutrophication because of frequent hand washing with soap and detergent which will be another challenge. Ground water may also be affected seriously. Metros and cities are also sanitised by water spray which is supposed to consume a large volume of fresh water. The Government and policy makers should take a note of this as a future environmental concern.바카라 웹사이트
Different measures are to be taken like setting up a network of public hand-washing stations – something done in West Africa during the Ebola outbreak of 2014.바카라 웹사이트By 2025, large urban and semi-urban areas will require new infrastructure to provide safe water and adequate sanitation.
(Dr. Manas Ranjan Senapati is Dean, Computer Application & Science of Biju Patnaik University of Technology, Odisha. He is presently working as Professor of Chemistry in Trident Academy of Technology, Bhubaneswar. Views expressed are personal.)
