A woman shops in the produce section at Whole Foods in New York City. The company recently announced it would prohibit produce farmed using biosolids in its stores. Stephen Chernin/Getty Images hide caption itoggle caption Stephen Chernin/Getty Images The Salt Whole Foods Bans Produce Grown With Sludge. But Who Wins? January 21, 2014 Whole Foods recently decided it would not buy produce from farmers who used treated sewage sludge, also known as biosolids, on their fields. But scientists say this is a mistake — the material is safe and benefits the environment in lots of different ways.