That, says Lifset, is where nanotechnology plays a role. In this emerging field, which employs just about every kind of scientific and engineering discipline, researchers expect to create products by building them from scratch, atom by atom, molecule by molecule. This bottom-up nanotechnological way of making things differs from the traditional drilling, sawing, etching, milling and other fabrication methods that create so much waste along the way.

Researchers have made headway toward molecule-size transistors and wires and even batteries thousands of times as small as the period at the end of this sentence. These laboratory feats make talk of sugar cube-size computers less speculative than it was a few years ago. Says Lifset: "A lot of the consumer goods and industrial equipment could become dramatically smaller when nanotechnology comes online. That, plus more efficient recovery of the discarded goods, ought to translate into huge reductions in waste."

But technology is not enough. Just as critical are changes in attitudes and lifestyles. Brad Allenby, AT&T's vice president for environment, safety and health, believes our move from the industrial age to the information age could help enormously. At last count, he says, 29% of AT&T's management force telecommuted, meaning less reliance on cars. This, Allenby speculates, could be part of something bigger--a shift in our view of what enhances our quality of life. Maybe we'll put less value on things that use lots of materials--like three cars in the family driveway--and more on things that don't swallow up resources--like telecommuting and surfing the Internet. Maybe downloading collections of music from the Web will reduce the demand for CD cases. And while visions of a "paperless office" have proved wildly wrong so far, we still have an opportunity to use computers to cut consumption of paper and the trees it comes from.

Allenby thinks of such trends as "dematerialization." The deeper dematerialization goes in society, the less stuff there will be to discard. What's more, as society becomes more information-rich, the easier it will be to find uses for the diminishing amount of discarded materials. Maybe, with the help of brokering services on the Internet, we can generalize the principle that governs garage sales: One person's garbage is another's treasure. When that attitude goes global, the human beings of the third millennium may be able to look back on their former garbage-producing ways as a forgivable error of their youth as a species.

Ivan Amato, a free-lance magazine and radio reporter, is the author of Stuff: The Materials the World Is Made Of.

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