- Knowing what problems threaten water environments.
- Understanding eutrophication.
- Being able to think about why water environments must be protected.
- Finnish water environments are fragile.
- Eutrophication is caused by nutrient emissions from human agriculture, habitation, and industry.
- Eutrophication threatens water ecosystems by changing their delicate balance.
- Dams are a threat to river ecosystems.
- Acid rain caused by industrial toxins can cause the acidification of water ecosystems.
- Invasive species can threaten the survival of native species.
- Key words: eutrophication, lack of oxygen, cyanobacteria, acidification, hydraulic engineering, environmental toxins, invasive species.
