Chapter 17
Resource Management and the Technology of Clean Water

Find the correct answer for each question.

1. How much of the total water on Earth is freshwater?

   1.   ?    3%
   2.   ?    12%
   3.   ?    0,75%

2. What means the term evapotranspiration?

   1.   ?    The transpiration of water from plants
   2.   ?    The transpiration of water from veretebrates
   3.   ?    The transpiration of water from humans (sweat and urine)

3. What is a recipient?

   1.   ?    A dam used for biological treatment of wastewater
   2.   ?    A filter used for mechanical treatment of wastewater
   3.   ?    A receiving water body (of for example wastewater and runoff)

4. How much of nitrogen in toilet waste water come from the urine?

   1.   ?    80%
   2.   ?    40%
   3.   ?    22%

5. How much water is consumed on average by a person per day?

   1.   ?    about 1 litres
   2.   ?    about 2 litres
   3.   ?    about 4 litres

6. In which of the following cities is tapwater not safe to drink?

   1.   ?    Gdansk
   2.   ?    Copenhagen
   3.   ?    St. Petersburg

7. The largest user of water worldwide is

   1.   ?    agriculture
   2.   ?    industry
   3.   ?    households

8. The largest withdrawal of freshwater in Sweden is from

   1.   ?    agriculture
   2.   ?    industry
   3.   ?    households

9. How much food is produced from irrigated land worldwide?

   1.   ?    80% of all food
   2.   ?    40% of all food
   3.   ?    10% of all food

10. How many people in the whole world die each day because of diseases in water?

    1.   ?    about 12 000
    2.   ?    about 7 000
    3.   ?    about 25 000