Nudging with carbon footprint labeling and product categorization motivates online shoppers to select plant-based foods, according to new research published by agricultural economists at Purdue University and the University of Kentucky. Nudging with carbon footprint labeling and product categorization motivates online shoppers to select plant-based foods, according to new research published by agricultural economists at Purdue University and the University of Kentucky. Social Sciences Economics & Business Phys.org – latest science and technology news stories