Compost, or synthetic manure, is basically a mass of rotted organic matter made from waste-plant residues.
And Princeton has people who are ready to shop, but perhaps they are looking for high-end items and not low-cost products made from waste.
In April and May it was home to TerraCycle, a New Jersey-based store that sells products made from waste materials.
That could include sources like hydrogen or electricity from renewable sources, or biofuels made from waste, algae or non-food vegetation.
As the cost of raw materials continues to rise, the UK's first A rated energy-efficient building made from waste, may be the first of many.
In Leeds we ate in a cafe run by the Real Junk Food Project, whose meals are made from waste or donated food.
Ideally, consumers could bring their waste to the store (as if it were a recycling center), get paid for it with cash or store credit, and buy products made from waste.
Its green features include a special air-filtration system that filters out 95 percent of particulate matter, an urban garden room within the lobby, and the green roofs, which use compost made from waste from the building's cafeteria.
Syntroleum is still pursuing coal- and natural gas-based fuels, but is also in a partnership with Tyson Foods that supplied the Navy with biofuel made from waste animal fat for the Green Fleet demonstration.
And in the long term, Widmaier said, his goal is to wean the yeast off corn sugar, a crop that could be feeding humans instead, and onto cellulose-based sugars made from waste paper, sawdust, and sewage sludge.
