Many buildings use a local underground in order to dispose of the waste water used there. Mostly untreated, this waste water is filtered as it percolates into groundwater. Immersive Reader river system

recharge zone

saturation zone

septic system

phosphorus cycle

explanation:

the phosphorus cycle is the way that compounds of the element phosphorus, an essential nutrient, are recycled in the environment. plants absorb phosphorus compounds from the soil, and decaying organic matter, including both plant matter and animal droppings, returns it to the soil. phosphorus is a vital part of atp, the energy currency of all cells, and is vital to all forms of life.