HERE’S one popular vision for saving the planet: Roll out from under the sumptuous hemp-fiber sheets on your bed in the morning and pull on a pair of $245 organic cotton Levi’s and an Armani biodegradable knit shirt.

Stroll from the bedroom in your eco-McMansion, with its photovoltaic solar panels, into the kitchen remodeled with reclaimed lumber. Enter the three-car garage lighted by energy-sipping fluorescent bulbs and slip behind the wheel of your $104,000 Lexus hybrid.

Drive to the airport, where you settle in for an 8,000-mile flight— careful to buy carbon offsets beforehand — and spend a week driving golf balls made from compacted fish food at an eco-resort in the Maldives.

That vision of an eco-sensitive life as a series of choices about what to buy appeals to millions of consumers and arguably defines the current environmental movement as equal parts concern for the earth and for making a stylish statement.