Two Manhattanites are trying to live a zero-impact life for a year.

An excerpt from the NYT story:

DINNER was the usual affair on Thursday night in Apartment 9F in an elegant prewar on Lower Fifth Avenue. There was shredded cabbage with fruit-scrap vinegar; mashed parsnips and yellow carrots with local butter and fresh thyme; a terrific frittata; then homemade yogurt with honey and thyme tea, eaten under the greenish flickering light cast by two beeswax candles and a fluorescent bulb.

A sour odor hovered oh-so-slightly in the air, the faint tang, not wholly unpleasant, that is the mark of the home composter. Isabella Beavan, age 2, staggered around the neo-Modern furniture — the Eames chairs, the brown velvet couch, the Lucite lamps and the steel cafe table upon which dinner was set — her silhouette greatly amplified by her organic cotton diapers in their enormous boiled-wool, snap-front cover.

A visitor avoided the bathroom because she knew she would find no toilet paper there.

Meanwhile, Joseph, the liveried elevator man who works nights in the building, drove his wood-paneled, 1920s-era vehicle up and down its chute, unconcerned that the couple in 9F had not used his services in four months. “I’ve noticed,” Joseph said later with a shrug and no further comment. (He declined to give his last name. “I’ve got enough problems,” he said.)

Welcome to Walden Pond, Fifth Avenue style. Isabella’s parents, Colin Beavan, 43, a writer of historical nonfiction, and Michelle Conlin, 39, a senior writer at Business Week, are four months into a yearlong lifestyle experiment they call No Impact. Its rules are evolving, as Mr. Beavan will tell you, but to date include eating only food (organically) grown within a 250-mile radius of Manhattan; (mostly) no shopping for anything except said food; producing no trash (except compost, see above); using no paper; and, most intriguingly, using no carbon-fueled transportation.

Mr. Beavan, who has written one book about the origins of forensic detective work and another about D-Day, said he was ready for a new subject, hoping to tread more lightly on the planet and maybe be an inspiration to others in the process.

Also, he needed a new book project and the No Impact year was the only one of four possibilities his agent thought would sell. This being 2007, Mr. Beavan is showcasing No Impact in a blog (noimpactman.com) laced with links and testimonials from New Environmentalist authorities like treehugger.com. His agent did indeed secure him a book deal, with Farrar, Straus & Giroux, and he and his family are being tailed by Laura Gabbert, a documentary filmmaker and Ms. Conlin’s best friend.

Why there may be a public appetite for the Colin-Beavan family doings has a lot to do with the very personal, very urban face of environmentalism these days. Thoreau left home for the woods to make his point (and secure his own book deal); Mr. Beavan and Ms. Conlin and others like them aren’t budging from their bricks-and-mortar, haut-bourgeois nests.

Mr. Beavan looks to groups like the Compacters (sfcompact.blogspot.com), a collection of nonshoppers that began in San Francisco, and the 100 Mile Diet folks (100milediet.org and thetyee.ca), a Vancouver couple who spent a year eating from within 100 miles of their apartment, for tips and inspiration. But there are hundreds of other light-footed, young abstainers with a diarist urge: it is not news that this shopping-averse, carbon-footprint-reducing, city-dwelling generation likes to blog (the paperless, public diary form). They have seen “An Inconvenient Truth”; they would like to tell you how it makes them feel. If Al Gore is their Rachel Carson, blogalogs like Treehugger, grist.org and worldchanging.com are their Whole Earth catalogs.