This week's food news roundup: U.S. states move to ban food dyes and additives, Thailand’s THAIFEX expo highlights the global shift away from ultra-processed foods, trade disputes continue to drive up tomato prices, a federal decision threatens to remove bison from public lands, and the Hajj brings people and culinary traditions together. The post Food Tank’s Weekly News Roundup: The Hajj Begins, States Move to Ban Food Dyes and Additives, and Trade Disputes Continue to Drive Up Tomato Prices ap