The weather is starting to warm and farmers in western Kentucky are preparing for the spring growing season. Part of that preparation is ordering chemicals to spray on the fields. Atrazine is a weed-killer corn and sorghum farmers have used widely for over fifty years. Continuing scientific studies question atrazine's impact on animal life. A recent study suggests atrazine changes hormones in male frogs, turning 1 in 10 into egg-producing females. Angela Hatton has more.