The Food and Drug Administration is set to announce as early as next week that meat and milk from cloned farm animals and their offspring can start making their way toward supermarket shelves. The decision would be a notable act of defiance against Congress, which last month passed appropriations legislation recommending that any such approval be delayed pending further studies. Moreover, the Senate version of the Farm bill ... contains stronger, binding language that would block FDA action on cloned food, probably for years. The FDA has hinted strongly in the past year that it is ready to lift its voluntary moratorium" on the marketing of milk and meat from clones and their offspring, saying that the science led them to that decision. But public opinion has been negative on the issue, with some saying that not enough safety studies have been conducted and others concerned about the health of the clones, which are far more likely than ordinary farm animals to die early in life. A handful of U.S. companies have pushed for marketing approval. Margaret Mellon of the Union of Concerned Scientists, an advocacy group, said she had read the entire 678-page draft risk assessment and found it to be "long on assumptions and short on data, and especially short on the data that are directly relevant to food consumption safety." Of particular concern, she said, was that even though the vast majority of clones die either before birth or soon after, those that survive are deemed normal. She said the FDA should withhold approval at least until it has a regulatory plan in place that will give it an ability to track food from clones and watch for human health impacts. Others have called for mandatory labeling so consumers can avoid products from clones. The FDA has said that lacking any safety concerns, it will not demand such labels. The Agriculture Department has also declared that meat from clones cannot be deemed organic.