If we have any hope of finding ways for seven billion people to live well on planet with finite resources, we have to learn to use our resources efficiently. Plastic bags are neither efficient nor environmentally friendly.

There is a gyre of discarded floating plastic the size of the continental USA in the ocean. In it, plastic trash outweighs plankton 40 to 1.

When I was a kid, being outside was the norm. Rain or shine, our parents would tell us to get out of the house.

We have become a force of nature Not long ago, hurricanes, tornadoes, floods, drought, forest fires, even earthquakes and volcanic explosions were accepted as “natural disasters or “acts of God.” But now, we have joined God, powerful enough to influence these events.

If we continue to set human borders and the economy as our highest priorities, we will never come to grips with the destructiveness of our activities and institutions.

A book is like a single tree in a forest, in that it exists in conjunction with and because of a great many others around it.

Scientists have been warning about global warming for decades. It's too late to stop it now, but we can lessen its severity and impacts.