How trade wars threaten food security

What began as heated rhetoric over trade between the United States and China has evolved into a potential trade war, with negotiations foundering and both countries proposing tit-for-tat trade barriers. (Meanwhile, open trade war has broken out on other fronts.) Our analysis shows that such policies will not only harm the two feuding nations but also have fallout among other countries in the global marketplace. (USDA photo by Bob Nichols)