Lower carbon footprints have been shown to sell more
In 2016, Thogersen and Nielsen demonstrated that by re-designing the carbon footprint label and making it similar to the aforementioned traffic light system, Danish consumers purchased more foods with relatively lower carbon footprints. This was also demonstrated amongst Australian consumers. 37 grocery products were carbon-labeled on pack using the following color system: green (below average), yellow (near average), and black (above average) carbon footprints. Sales were recorded over a three-month period. The study found that over the three-month period, sales for black-labeled products decreased by 6 percent after labeling; while sales for green-labeled products increased by 4 percent throughout the same period.