Earth Overshoot Day Simulator

Earth Overshoot Day is the calendar date each year on which humanity's demand for ecological resources and services exceeds what the biosphere can regenerate in that year. This simulator turns the underlying accounting into an interactive 3D model: six adjustable demand categories — carbon, cropland, grazing land, forest products, built-up land and fishing grounds — sum to a total "Earths demanded" figure, which sets where a 365-marker calendar ring flips from green (within budget) to red (ecological debt). Press play to sweep a marker around the ring in real time and watch a red debt halo grow around the globe once the sweep crosses Overshoot Day.