Elephants are not human, of course. They are something much more ancient and primordial, living on a different plane of existence. Long before we arrived on the scene, they worked out a way of being in the world that has not fundamentally changed and is sustainable, and not predatory or destructive.

In 1990, my wife and I were married in her village in southwestern Uganda. The festivities went on for three days, and all the while a couple of dozen gray-crowned cranes, with regal bonnets of sun-shot yellow feathers, were pecking and padding around in the adjacent savanna.

The plumbing and pluvial dynamics of the Amazon, the largest freshwater system on Earth, are still far from understood. This is partly because it is a semi-open system. Moisture flows in and out unpredictably. A lot of nonlinear feedback loops and 'remote influences' - continental, transcontinental, oceanic, meteorological - come into play.

The global climate is a complex interactive system, with all kinds of nonlinear feedback loops.

Before you rip off three feet of toilet paper, consider that each year 500,000 acres of virgin boreal forest in northern Alberta and Ontario are being clear-cut to make the stuff. These forests are home to some 500 First Nation communities, as well as caribou and bears, moose and wolves, and, in the summertime, billions of songbirds.