Agriculture & Environmental
Lake Eutrophication
algae ↑ then dissolved O₂ crash

Nutrient loading fuels an algal bloom that saturates the surface; when the bloom dies and decomposes, microbial respiration draws down dissolved oxygen, crashing it toward a hypoxic dead zone.
Computed & rendered in pure C# on the frozen OnlyCSharp 1.8 library — animation baked to GIF with the library's own
Gif encoder (no GPU, no ffmpeg, no external packages).