How Safe Are Green Cleaning Products?

Jennifer Martiné threw a party Thursday night, and her guests brought food, wine -- and empty spray bottles.Using vinegar, baking soda, essential oils and castile soap, they spent the evening making batches of natural household cleaners.

Martiné, 28, is one of more than 100 women who've signed up to host so-called green cleaning parties across the country this spring, part of a nationwide campaign led by Women's Voices for the Earth, a nonprofit group based in Missoula, Mont.