Wood smoke contains some of the same particulates as cigarette smoke, said Dr. Norman H. Edelman, the chief medical officer for the American Lung Association, as well as known carcinogens like aldehydes; it has also been linked to respiratory problems in young children.

“We now know from lots of studies that wood smoke is very, very irritating,” Dr. Edelman said. “It contains a lot of irritating gases and it also contains damaging particulate matter. It’s probably not good for anybody, and it’s especially bad for anybody who has a chronic respiratory problem.” So the association strongly advises people not to use the traditional fireplace, he said.

Certainly, there are many who consider this eco-overkill. In Greek mythology, fire is a gift from the divine, stolen from Zeus by Prometheus and handed over to shivering humanity. What could be more natural than sitting around a crackling fire on a winter night, at a campsite in the Berkshires or in a Brooklyn brownstone?

But growing concerns about the air pollution and health problems caused by smoke from wood fires are prompting a number of areas across the country to pass laws regulating them.

“A lot of municipalities are taking action,” said Ms. Bailey, adding that the weather-based measures called burn bans are perhaps the most widespread restriction. When the weather is cold and the air is still, or pollution is high, the Bay Area in California, Puget Sound, Wash., Denver and Albuquerque are among the places with restrictions on residential wood-burning. These measures can be mandatory or voluntary, and can become more restrictive as air quality declines. So far, most of the wood-burning regulations tend to be out West. A few examples: Idaho offers tax incentives to people who replace uncertified wood stoves with “greener” ones; San Joaquin County in California forbids selling a home unless its wood stove is replaced with an E.P.A.-certified one; and Palo Alto and other municipalities in California prohibit wood-burning fireplaces or stoves in new construction.

Perhaps not coincidentally, sales of wood-burning appliances dropped to 235,000 in 2009 from 800,000 in 1999, according to the Hearth, Patio and Barbecue Association. And the Brick Industry Association, which promotes brick construction, reports that roughly 35,000 masonry fireplaces were installed in the United States in 2009, compared to 80,000 in 2005. Certainly those numbers reflect the economic slowdown, but they may also be affected by growing ambivalence to wood fires.