A global ecological deficit is called overshoot, and today, August 13, is Earth Overshoot Day. Earth Overshoot Day marks the date when humanity's demand on renewable natural resources exceeds the supply that our planet can regenerate. More simply, it's the date humanity has spent our planet's budget for the entire year. This year, that date arrives more than four months before the year ends. As recently as 2000, Earth Overshoot Day fell in October.