Nothing ever dies, nothing ever goes away.

Everything is connected to everything else. Everything must go somewhere. Nature knows best. There is no such thing as a free lunch.

My entry into the environmental arena was through the issue that so dramatically - and destructively - demonstrates the link between science and social action: nuclear weapons.

The favorite statistic is that the U.S. contains 6 to 7% of the world population but consumes more than half the world's resources and is responsible for that fraction of the total environmental pollution. But this statistic hides another vital fact: that not everyone in the U.S. is so affluent.

Nothing ever dies, nothing ever goes away.

As the earth spins through space, a view from above the North Pole would encompass most of the wealth of the world - most of its food, productive machines, doctors, engineers and teachers. A view from the opposite pole would encompass most of the world's poor.

Perhaps the simplest example is a synthetic plastic, which unlike natural materials, is not degraded by biological decay. It therefore persists as rubbish or is burned-in both cases causing pollution. In the same way, a substance such as DDT or lead, which plays no role in the chemistry of life and interferes with the actions of substances that do, is bound to cause ecological damage if sufficiently concentrated.