Proof of work may be Bitcoin's most least understood concept. "Why can't we just change the code to make it more energy friendly?" The answer to that question is best discovered by the questioner themselves. This website -- https://ElectricMoney.org -- can help them along in that process. This is a simple, plain-language, first-stop explainer for your normy friends who just don't quite get it. It falls somewhere between a headline and an academic paper. It requires a person simply take the time to click the link and perhaps read just a few short sentences; that may be enough to plant the seed.