1. Water

2. What do you use water for each day?

3. 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

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

5. 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

6. 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.