Environmental Sustainability

How serious are the threats to our environment? Here is one measure of the problem: if we continue to do exactly what we are doing, with no growth in the human population or the world economy, the world in the latter part of this century will be unfit to live in. Of course human activities are not holding at current levels—they are accelerating, dramatically—and so, too, is the pace of climate disruption, biotic impoverishment, and toxification.

Soccer moms drive Priuses. Sport utility vehicles are going hybrid. Families are using hemp shopping bags. More and more companies are developing "green" buildings. What's more, the business consultants say going green is easy and profitable. In reality, though, many green-leaning businesses, families, and governments are still fiddling with the small stuff while the planet burns. Why?