The document summarizes information about a body of water called Janina in 3 sentences: Janina is an artificial lake built in the 1940s-1950s that covers 1.4 hectares and has an average depth of 1.2 meters. It provides habitat for many animal species and recreation opportunities like fitness trails and bike lanes. A survey of 70 people found that most know of Janina but do not have extensive knowledge about it, such as its sources of pollution.

1. Water balance
on Earth

3. • an artificial lake
• built at the turn of
40s and 50s
• surface – 1,4ha
• average depth – 1,2m

4. Fitness trails.
Bike lanes.
Home for many species of animals.

5. RECREATION
Good conditions to do sports.
Many bike lanes.
BREEDING
Jetties for fishermen.
It delivers industrial water for
technological processes.
A source of drinking water for
animals.

6. We asked many questions.
We were very curious.
Nothing escaped our attention.

7. We found out how much
people know about the body
of water called Janina.
We questioned 70
people, asking them 11

8. Do all members of your family
know the body of water Janina?
60 57
50
Number of people
40
30
20
10 8
5
0
yes, all most of them nobody knows
Most of people know the body of water called Janina but they
do not have enough knowledge about it.
They use bike lanes in the area of the body of water.
They do not fish there.
People know sources of pollution of the body of water.

9. Lectures
Sightseeing
Work record

10. Mechanical – biological – chemical water purification plant Gigablok:
- based on the activated sludge method
- disposal of biogenes
- grit chamber
- sludge higienisation facility
- sludge digestion chambers

11. light orange colour
odour-free, not transparent
after filtration – the sediment was
red
 pH 10
 high nitrate content – 10mg/l

12. water polluted with heavy metals
water polluted with detergents
third class water quality
water eutrophication

13. We have learnt how to improve the condition of the
enviroment.
We have learnt creative and precise solutions for the local
enviroment.
We have raised our sense of responsibility for this part of
Earth where we live.

14. We have made a poster which
summarizes our work and written
an article to the locan newspaper 
We have raised our sense of
responsibility for the piece of
Earth we live on.

15. Thanks for
your
attention! 