The FDA’s announcement of a three-year phase out of most uses of trans fats, usually present in foods as partially hydrogenated oils (PHOs), may not be the end of the story, says Time. The replacements for PHOs “have their own problems.” Foodmakers could shift to crops with high levels of oleic acid, such as varieties of soybeans, canola, cottonseed and palm. High oleic oils are more healthful than PHOs but don’t contain as much linolenic oil as conventional varieties. “Palm oil, in particular, is likely to be a solution many companies turn to in the coming years,” says the article by Elizabeth Grossman, but it could lead to palm oil plantations replacing rain forests in Asia. The environmental group Friends of the Earth says the United States should set environmental and social standards on purchasers of palm oil.