Water and Health

1.3 billion people have no access to water. 2 billion have no sanitary equipment. 4 billion are not connected to sewer systems. Contaminated water kill more more than AIDS – 5 million people per year. • source: Water • Cross-Ref: … Continue reading

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Cities running dry

CHINA: Between 1983 and 1990, the number of cities in China that were short of water rose from 100 to 300; those with a serious water problem, from 40 to 100. In the year 2000, Beijing Municipality suffers a daily … Continue reading

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Industry Water Needs

Industry is the second largest water user after agriculture. In addition to using water for producing goods, industry rejects in the environment large amount of heavily polluted water. Some typical industries: Steel Industry: uses 150,000 l of water per tonne … Continue reading

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Water properties

Water is composed of 2 atoms of Hydrogen bound to one atom of Oxygen. Its molecular combination makes it a very reactive substance. Water is a powerful, non-toxic solvent Water freezes at 0º C and evaporate at 100º C. This … Continue reading

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World Water Stock

Volume km3 % total Oceans 1,350 10^6 97.4% Ice 27.7 10^6 1.98% Underground water 8.2 10^6 0.59% Interior seas,lakes,rivers 207,000 0.015% Moisture in Soils 70,000 0.005% Moisture in air 13 0.001% Water in living cells 1.1 0.001% (estimated by Soviet … Continue reading

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Global Water cycle

The water cycle receives its energy from the solar “machine” and has two phases: Evaporation and precipitation. Global Evaporation – over lands: 71,000 km3/yr – over oceans: 411,000 km3/yr Global Precipitation: – over lands: 111,000 km3/yr – over oceans: 385,000 … Continue reading

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Water Needs

Year 2000. Population 6 billion people. in km3/yr Intake Use Irrigation 3,250 2,580 Evaporation from Dams 250 250 Industry 1,280 190 Domestic Food 660 90 Total 5,440 3110 The difference between intake and use is waste water – water disposed … Continue reading

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Human needs

Water is essential to life. In average, we need a minimum of 1.5 l/day to survive. 10% less water provokes hallucination and 15% death. In areas where annual water supplies drop below 1,000 m3 per person per year, (including agriculture, … Continue reading

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World Water Forum Concerns

Many of us regard water as a simple, relatively inexpensive, substance: something we take for granted. Yet this simple substance – so critical to humanity’s existence – is expected to be the greatest source of global conflict as we embark … Continue reading

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