Ah, finally, someone who might be able to answer my questions in English!  Can you explain how the "proof of" methods differ from one another, and the pros and cons of each?
https://steemit.com/blockchain/@plotbot2015/are-we-blockheads-when-it-comes-to-energy

You should probably cite this transcript, as many statements appear to be direct quotes.
https://steemit.com/bitcoin/@bluebrain/andreas-antonopoulos-immutability-and-proof-of-work-the-planetary-scale-digital-monument-full-transcript