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“Self-restoration” of a river
z | Problems | Serious problems | On the way to recovery | Clear water |
Much lifeMuch oxygenNo smellClean water | Fungi developLittle oxygenSlightly smellyGrey or dark water | Organisms that do not need oxygenNo oxygenA smell of rotten eggsBlack water | A little sign of lifeA little oxygenSlightly smellyWater becoming clearer | Much lifeSufficient oxygenNo smellClear water |
ASSIGNMENT 10
Go for a walk along a river. What do you observe? Collect samples of shells, feathers, plants, etc. from along the route, but take care to avoid doing damage. Find out whether some parts of the river are more polluted than other parts and whether there are parts that have been restored after being exposed to pollution.
If you identify an area where the levels of pollution are high, you could also return to it and launch a cleaning operation.
ASSIGNMENT 11
Listen to the song “Acid Rain” by Wendy Oldfield. There are more songs that have messages concerning the environment. Draw up a list of such songs and have a class discussion on the issues that are addressed in them.
ASSIGNMENT 12
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