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oxygen available in water that is " breathed" by fish and other animals, the oxygen is passed by the water going through the fishes gills. If the oxygen drops than the fish will die
sustainable water use
where the amount of water that is being used is sustainable and is available for future generations.
soil properties affected by soil texture
Aeration, Drainage(percolation), nutrient holding, water holding, workability
how much acid is in the soil, affects plants and is affected by the plants, low pH increases leaching
Degradation of African Sahel
Overgrazing from population, drought dust scatters across atlantic and bleaches=kills coral reefs
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