Canada is banning the use of the chemical bisphenol A (BPA), which it declared a hazardous substance, in baby bottles. It is creating regulations to bar importing, advertising and selling polycarbonate baby bottles containing BPA, as well as limit the amount of the chemical being released into the environment. While regulatory agency Health Canada said it would work with the industry to limit BPA in infant formula tin linings, Dr. Rick Smith, executive director of the Canadian group Environmental Defence, says that the government should ban the use of BPA altogether.