How much water should you drink a day? You probably know that it's important to drink plenty of fluids when the temperatures soar outside. But staying hydrated is a daily necessity, no matter what the thermometer says. Unfortunately, many of us aren't getting enough to drink, especially older adults. "Older people don't sense thirst as much as they did when they were younger. And that could be a problem if they're on a medication that may cause fluid loss, such as a diuretic," says Dr. Julian Seifter, a kidney specialist and associate professor of medicine at Harvard Medical School.
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It seems we are surrounded by it.
It covers over 70 percent of the earth’s surface and makes up approximately 60 percent of the human body.
So, why are so many people concerned about conserving it?
Simply because despite the fact there’s so much of it around, only a tiny fraction of that water (less than 1 percent) is accessible and safe for human consumption.
Also consider that the average American personally uses 80–100 gallons of water every day.
With all of that H2O constantly flowing, it can be easy to forget just how rare freshwater really is.
