The blockchain never leaves the headlines. But it turns out that the blockchain may not be the same as in the Bitcoin network, energy-consuming and ineffective. Could blockchain be a companion for sustainable development? Yes, if it is a special type of network.
At its core, blockchain is a distributed ledger, a safe way to store data in verifiable copies on different nodes. Traditional databases typically have one user responsible for it who decides who has access to the data and who can contribute, edit, and delete it. In the blockchain, no one can change or delete data, it is possible only to enter and view it.