Maryland is set to ban the arsenic-containing drug Roxarsone in chicken feed. Maryland is a major chicken producer, and that puts it ahead of most other states as well as the federal government. It is all the more remarkable, given that 'Big Chicken' is a major force in Maryland politics.

"At his family farm on Maryland's Eastern Shore, Lee Richardson raises thousands of chickens from fuzzy hatchlings to the juicy broilers stacked at grocery stores far and wide. Like a lot of farmwork, this seems simple, but it's not.

"A new law in Pennsylvania has doctors nervous."

"FRAZEE, MINN. - Don and Norma Smith couldn't understand why their sheep stopped producing lambs in the mid-1990s. When half the animals died mysteriously over one winter, they gave up on the profitable hobby that had won blue ribbons for their kids at the Minnesota State Fair."

"LONDON -- Malaria-carrying mosquitoes in Africa and India are becoming resistant to insecticides, putting millions of lives at greater risk and threatening eradication efforts, health experts said on Tuesday."

"When writer Florence Williams was nursing her second child, she read a research study about toxins found in human breast milk. She decided to test her own breast milk and shipped a sample to a lab in Germany. What came back surprised her. Trace amounts of pesticides, dioxin and a jet fuel ingredient — as well as high to average levels of flame retardants — were all found in her breast milk. How could something like this happen?"

"The number of children considered at risk of lead poisoning jumped by more than five-fold on Wednesday, as the U.S. Centers for Disease Control and Prevention lowered its threshold for the diagnosis. Children's health advocates applauded the decision, but also expressed concern that recent congressional budget cuts will drastically limit funds that could help affected kids and prevent further poisoning."

"Chemical titans say they have what farmers need to fight superweeds, but will they only be adding to a growing problem?"