![Nitrogen Cycle](assets/Nitrogen Cycle.png)

  • We draw nitrogen from the atmosphere and transform it into reactive forms (nitrate and ammonia)
    • Part of it goes to the biosphere
      • Use of Nitrogen as fertilizer
    • Part goes back in the atmosphere causing air pollution, acid rains and GHG effects
    • Part of it goes back to oceans and rivers
      • Goes algae to bloom

![Global Nitrogen Cycle](assets/Global Nitrogen Cycle.png)


Phosphorus Cycle

Caused by fertilizer application

  • Over nutrient areas
    • Algae bloom, then die, causing
      • Ocean Dead Zones (potentially irreversible)

![Global Phosphorus Cycle](assets/Global Phosphorus Cycle.png)

Created on: 2021-01-18 Inspired by: Link: Related: Course - Planetary Boundaries | Planetary Boundaries