Agriculture & Environmental
First-Order Contaminant Decay
C = C0 · e^(-k·t)

A contaminant that breaks down at a rate proportional to what remains decays exponentially; sweeping the rate constant contracts the half-life, turning a persistent pollutant into a short-lived one.
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).