phosphorus cycle
The phosphorus cycle is a global chemistry show starring the element phosphorus as it pirouettes between soil and water. Humans lavishly spread industrial fertilizers in the name of agriculture, only to drape waterways in a cyan-green miasma. Academics chase this motion with elaborate models, churning out graphs no one reads. Nature appears to play along with neat loops, only to deliver humanity's short-sighted whims back with unapologetic vengeance.