“Consumers will have a whole new level of transparency about whether the food we eat is contributing to environmental degradation or social injustice such as slavery”, said WWF- Australia CEO Dermot O’Gorman.

By scanning product QR codes. Once a QR code is scanned, the user is shown information about where a specific product came from, when and how it was produced, and how it traveled along the supply chain. This information is then put on a Blockchain which records the movement of the product and stores additional information, such as the temperature of food in storage.
https://www.wwf.org.nz/what_we_do/marine/blockc...a_project/