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Last Updated: Friday, 15 October, 2004, 16:07 GMT 17:07 UK
Quiz: World water crisis
Cambodian boy filling bottle
Many people don't have access to clean water - but how many?
You drink it, wash in it and flush the toilet with it every day. But how much do you appreciate the finer points of the liquid that sustains life?

Try our quiz to test your knowledge of the uses - and diminishing supplies - of water around the world.

Question 1
The average Sub-Saharan African uses the same amount of water in a day as someone in a developed country uses when they do what?
A: Brush their teeth for two minutes with the tap running
B: Run a lawn sprinkler for a minute
C: Flush a toilet
D: Any of the above
Question 2
The number of people dying from waterborne disease is equal to how many large passenger jets crashing every day?
A: 8
B: 24
C: 46
D: 69
Question 3
Most of the Earth is made up of sea. But exactly what proportion of our planet’s water is not salty?
A: 0.5 %
B: 15%
C: 4.2%
D: 2.5%
Question 4
It takes between 0.4 and three cubic metres of water to produce a kilogramme of cereals. How much does a kilo of grain-fed beef need?
A: 3
B: 5
C: 10
D: 15
Question 5
How many people in the world do not have access to clean drinking water?
A: 1 in 3
B: 1 in 6
C: 1 in 10
D: 1 in 20
Question 6
What proportion of the world’s major rivers are seriously polluted or depleted?
A: 10%
B: 25%
C: 50%
D: 75%
Question 7
Which of these countries uses most water per person per year?
A: Russia
B: India
C: Egypt
D: Germany
Question 8
The World Commission on Water estimates that it would cost an extra $100bn a year to tackle global water scarcity. What is this roughly equivalent to?
A: The amount spent on ocean cruises, make-up and ice-cream yearly
B: The net worth of Microsoft chief Bill Gates
C: The estimated value of the worldwide bottled water industry
D: A quarter of the US budget deficit

 Press the button and see how you have done


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