Walmart has been working with IBM to develop a blockchain-based tracking system for its own supply chain. Without the system, it took over six days to track a pack of sliced mangoes back to their source; with the system, it took only 2.2 seconds. However, for the system to work properly, it needs everyone along the supply chain to use it, and to use it honestly.
The future could see customers able to scan a food package with their phone and see instantly where it came from.
Read the story here. See also the Foodsource resource Lifecycle assessment of food products is a complex undertaking.