What Is Microorganisms that live in water feed on biodegradable substances. When too much biodegradable material is added to water, the number of microorganisms increase and use up the available oxygen. This is called oxygen depletion. When oxygen levels in the water...
What Is Surface waters are the natural water resources of the Earth. They are found on the exterior of the Earth’s crust and include: Oceans Rivers Lakes These waters can become polluted in a number of ways, and this is called surface water pollution. Types of Water...
