The phosphorus cycle "دورة الفوسفور"

Phosphorus is a key component of cell membranes, DNA, RNA, ATP and ADP
Most phosphorus is within rocks and is released by weathering
With naturally low environmental concentrations, phosphorus is a limiting factor for plant growth
Food webs: Plants take up phosphorus when it is dissolved in water

Mining rocks for fertilizer moves phosphorus from the soil to water systems
Wastewater discharge also releases phosphorus
Runoff containing phosphorus causes eutrophication of aquatic systems
Household detergents may contain phosphorus