Why can't I find anything on how "green" Brave is?

I used several search engines and not one if them showed me any information on how green Brave is or how it is powered.

Why is that ?

If you really want to be open about what you do then why hide how you get powered ?!?

Please dear folks at Brave, add a link on your brave.com and search.brave.com page showing the users how “green” you are.
I know for a fact that many people will appreciate that.
Thank you.