As of Tuesday, the Earth's ecological budget for the year has maxed out. For the rest of the year the planet will operate on an ecological deficit. And it's only August. So claims the Global Footprint Network, which calls today "Earth Overshoot Day," its annual estimate of when human consumption exceeds the planet's ability to regenerate its resources for the year. "It's a bit of a gimmick, I admit," said the group's president Mathis Wankernagel,in a phone interview from Switzerland. "It's not that tomorrow I won't be able to eat potatoes anymore." But, he said, it's meant to make a...