Phytoremediation Cycle Simulator (2D)

Plant hyperaccumulator or ordinary species into contaminated soil and run repeated plant-grow-harvest cycles on a top-down plot. Hyperaccumulators tolerate and actively draw heavy metals into their tissue far beyond what an ordinary plant can survive, so soil contamination visibly drops cycle by cycle while an ordinary plant instead wilts or extracts comparatively little. Track the live soil-contamination readout and the estimated number of cycles left to reach your cleanup target.