they will not be allowed to expand or renew permits with the state, no new mining companies that do not completely use renewable energy will not also not be allowed to begin mining. See also Bitcoin Bitmessage Cryptocurrency Proof of authority Proof of burn Proof of personhood Proof of space Proof of stake Proof of elapsed time Ouroboros (protocol) Consensus (computer science) Notes On most Unix systems this can be verified with echo -n 1:52:380119:calvin@comics.net:::9B760005E92F0DAE | openssl sha1 References External links bit gold Bit gold. Describes a complete money system (including generation, storage, assay, and transfer) based on proof of work functions and the machine architecture problem raised by the use of these functions. Merkle Proof Standardised Format for Simplified Payment Verification (SPV). Cryptography Cryptocurrencies Energy consumption