In my opinion, eco-friendly cryptocurrency is just a marketing word (trick). based on a study, currently, bitcoin mining (the majority) has used sources that are more environmentally friendly,

so if the government claims that the cryptocurrency they create is more environmentally friendly, isn't that just a trick of diversion? other than that people who use cryptocurrency are those who want to be free from government restraint, so using cryptocurrency that the government issues is like "coming out of the lion's cave but entering the crocodile cave"
Government-created cryptocurrencies or CBDCs (Central Bank Digital Currencies) are nothing more than an excuse and a fight against the spread of cryptocurrencies in the world. Banks and other central authorities find cryptocurrencies to be a threat to their existence since they provide almost everything for free which they provide for a price.
People are slowly moving towards cryptocurrencies and starting to abandon traditional financial systems and that is the reason why they have come up with the idea of creating their own digital currencies so that citizens start using those and leave cryptocurrencies.