Effects of environmental impact labels on the sustainability of food purchases: A randomised controlled trial in an experimental online supermarket. - Potter, Christina; Pechey, Rachel; Clark, Michael; Frie, Kerstin; Bateman, Paul A.; Cook, Brian; Stewart, Cristina; Piernas, Carmen; Lynch, John; Rayner, Mike; Poore, Joseph; Jebb, Susan A. (PLoS ONE, 2024)