Most ethical crypto currency

I’ve recently gotten interested into crypto. Is there any more energy efficient/green coins that are also generally used for ethical transactions? I was thinking about how the anonymous transactions has been used by many people to do illegal things. I’m sure I’m asking a loaded question, but I’m interested in ethical investing in general. I’m wondering if anyone has done this research. If you have any suggestions to further research, please post below!

Solarcoin and Cardano seem interesting to me, but I haven’t looked into them too much.