Let me ask a question: do you really think that changing the behaviour of the 1% richest people would change anything on the pollution problem ?
Yes, I really do think that changing the behaviour of those people who are producing 15% of global emissions will have an effect on global emissions.
Not really. Blockchain technology has one use case and that is collaboration between partners who don't trust each other. So we're talking crypto coins, where not all nodes are really trustworthy and there is an incentive to cheat. But there's no reason to bring this tech to your Git repository because you really do not want untrustworthy participants in your code. Only you should have access to your Git rep, and then the easier solution is to host it yourself and use a normal database.