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insteading.com/blog/clean-water-human

Yet access to clean, fresh drinking water is a major world concern. An infograph I ran across on world water day helps to show, in a simple format, why this is the case. How much water is available for human use? M Kuhn / Flickr (Creative Commons) First though, via planet green, here are some interesting water use numbers to chew on:

water.usgs.gov/edu/earthwherewater.html

The left-side bar chart shows how almost all of Earth's water is saline and is found in the oceans. Of the small amount that is actually freshwater, only a relatively small portion is available to sustain human, plant, and animal life. The globe image represents how much actual water exists, compared to the total size of the Earth.

www.greenfacts.org/en/water-resources/l-2/3-amount-by...

The quantity of freshwater that is available to a given country without exceeding the rate at which it is renewed, can be estimated taking into account the amount of precipitation, water flows entering and leaving the country, and water shared with other countries.

en.wikipedia.org/wiki/Fresh_water

Fresh water is not the same as potable water (or drinking water). Much of the earth's fresh water (on the surface and groundwater) is unsuitable for drinking without some treatment. Fresh water can easily become polluted by human activities or due to naturally occurring processes, such as erosion.

www.lenntech.com/water-quantity-faq.htm

Groundwater and fresh water stored in surface bodies and in the atmosphere represent an available resource of fresh water. Most of the freshwater is stored in glaciers and icecaps, mainly in the Polar Regions and in Greenland, and it is unavailable. This is another 24.500.000 km 3 of water, formig the 69.5 % of the total fresh water of the Earth.

www.livescience.com/29673-how-much-water-on-earth.html

Countries labeled as moderate to high stress consume 20 percent more water than their available supply. There is much more freshwater stored in the ground than there is in liquid form on the ...

www.usbr.gov/mp/arwec/water-facts-ww-water-sup.html

0.5% of the earth's water is available fresh water. If the world's water supply were only 100 liters (26 gallons), our usable water supply of fresh water would be only about 0.003 liter (one-half teaspoon). In actuality, that amounts to an average of 8.4 million liters (2.2 million gallons) for each person on earth.

www.usgs.gov/special-topic/water-science-school/science/...

Left bar: All water, freshwater and saline, ... Of the small amount that is actually freshwater, only a relatively small portion is available to sustain human, plant, and animal life. Notice how of the world's total water supply of about 332.5 million cubic miles of water, over 96 percent is saline. And, of the total freshwater, over 68 percent ...

www.nationalgeographic.com/environment/freshwater/...

Freshwater makes up a very small fraction of all water on the planet. While nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. The rest is saline and ocean-based ...

www.greenfacts.org/en/water-resources/index.htm

3. How much freshwater is available in different countries? The quantity of freshwater that is available to a given country without exceeding the rate at which it is renewed, can be estimated taking into account the amount of precipitation, water flows entering and leaving the country, and water shared with other countries.