Blockchain could track honey from hive to jar, busting fraud with transparent supply chains & smart contracts.
Why do you need a blockchain? A regular database can do that as well, and they use a lot less energy.
As for why blockchain: if you did this on a regular database, you'd be trusting a third party to run that database. Businesses tend not to like that, because sooner or later it gets hard to switch away and the third party starts charging a lot more money.