Water.

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Presentation transcript:

Water

What do you use water for each day?

Litres used - per activity The average European uses 200 litres of water every day for their drinking, washing and cooking Activity Average weekly use Litres used - per activity Bath 2 80 per bath Flushing the toilet 35 8 per flush Gravity shower 7 35 per shower Power shower 80 per shower Washing machine 3 65 per wash Dishwasher 4 25 Watering the garden 1 540 Washing car with bucket 1 (4 buckets) 8 per bucket = 32 litres Washing car with hose pipe 400 - 480

What can make water unsafe to drink? insoluble substances (sand, mud, etc.) dissolved substances (salt, etc.) pathogens (bacteria, viruses, protists, parasites, etc.)

How is water cleaned in Switzerland? physical separation by filtration and sedimentation biological processes such as activated sludge chemical processes such as chlorination electromagnetic radiation such as ultraviolet light

Does everyone in the world have access to clean water? In 2010 about 84% of the global population ( 6,740 million people) had access to piped water supply through house connections or to an or to another improved water source (standpipes, "water kiosks", protected springs and protected wells). However, about 14% ( 884 million people) did not have access to an improved water source and had to use unprotected wells or springs, canals, lakes or rivers for their water.