Importance of water as a solvent
Importance of water as a solvent, for example dissolved gases like oxygen are important for ecosystems.
Information and ideas:
Not many students know that not only solids and liquids but also gases dissolve in water (how could fish breathe otherwise?).
Using the followins source: Umweltbundesamt, Bundesministerium für Ernährung und Landwirtschaft, Scripps Institution of Oceanography, UC San Diego