New rules will let millions of Americans know where more of their food comes from. The law is known as COOL—Country of Origin Labeling. American Congress first passed the law in 2002. Stores have had to label seafood by country of origin since 2005. But industry pressure delayed other requirements until last week. Products that must now be labeled include fresh fruits and vegetables, muscle meats and some kinds of nuts. But the rules are complex, and many foods are excluded. For example, organ meats are free to be labeled. So are processed foods, including cooked or smoked food. The