Tax the Miners huh???
How about just recommending that the miners do their research on simply buying mining equipment from environmentally friendly/responsible companies.
The number one reason to use bitcoins is the deregulation of the currency. Imposing taxes requires regulation and Government involvement. More importantly if and when a Government agency imposes taxes who's to say those Governments will direct those new tax revenues towards environmental programs.
I have a better idea. Rather than tax bitcoin miners support and encourage more of them so that the amount of fiat paper cash and metal coin production gets reduced to save the environment. Do you realized how many resources are used to create a Dollar Bill? Better yet a Dollar Bill lasts less than an average of 18 months. Bitcoins, when produced, exists in the bitcoin economy forever.
Donate here if you like my idea or better yet like a tax and regulation free bitcoin network:
113Z4PyeQLXE1E9CDTuQsnJffgKo7C8CP4
Donations made will go to solar panel and other environmentally friendly energy production so I can continue mining environmentally friendly bitcoin.
BTC