When Clorox introduced Green Works, its environment-friendly cleaning line, in 2008, it secured an endorsement from the Sierra Club, a nationwide introduction at Wal-Mart, and it vowed that the products would “move natural cleaning into the mainstream.”

Sales that year topped $100 million, and several other major consumer products companies came out with their own “green” cleaning supplies.

But America’s eco-consciousness, it turns out, is fickle. As recession gripped the country, the consumer’s love affair with green products, from recycled toilet paper to organic foods to hybrid cars, faded like a bad infatuation. While farmers’ markets and Prius sales are humming along now, household product makers like Clorox just can’t seem to persuade mainstream customers to buy green again.