Chapter 12
Metal Flows and Environmental Impact

Find the correct answer for each question.

1. Micronutrients, what is it?

   1.   ?    Small concentrations of phosphate ions with high biomassproduction qualities.
   2.   ?    Heavy metals that is needed in certain biological processes.
   3.   ?    Another term for Potassium and Sodium needed in many biological processes.

2. Which of the environmental disasters below is especially connected with mercury?

   1.   ?    1976 in Seveso, Italy
   2.   ?    1950s Minamata, Japan
   3.   ?    1984, Bhopal, India

3. Were is the most important mercury mine situated?

   1.   ?    In Russia.
   2.   ?    In Spain
   3.   ?    In Myanmar

4. In which industrial activity is mercury an important component?

   1.   ?    Papermills
   2.   ?    Chlor-alkali industry
   3.   ?    Paint industry

5. Level of lead in the environment has in recent years:

   1.   ?    Declined
   2.   ?    Increased slightly
   3.   ?    Increased heavily

6. Which one of theses metals is the biggest problem for the environment?

   1.   ?    Chromium
   2.   ?    Zinc
   3.   ?    Cadmium

7. Which pathway is the largest source of heavy metal loads to the Baltic Sea?

   1.   ?    Rivers
   2.   ?    Municipalities
   3.   ?    Industries

8. In which country is oil-shale mining important?

   1.   ?    Latvia
   2.   ?    Estonia
   3.   ?    Finland

9. How much ore approximately is needed to produce 1 tonne of copper?

   1.   ?    50 tonnes
   2.   ?    800 tonnes
   3.   ?    1600 tonnes

10. How much ore is needed to produce gold?

    1.   ?    about 1 million times more
    2.   ?    about 22 000 times more
    3.   ?    about 6 000 times more

11. Which metal is mined in the highest quantities?

    1.   ?    Iron
    2.   ?    Copper
    3.   ?    Aluminium