If all the country will adopt cryto currencies as their currency. Earth will be green. You know why? Because Paper Bills are made from papers materials. Papers are made up from the trees. If the use of paper bills will be reduces, we can safe many trees. We can help mother Earth to recovered. Why people need to cut off all the trees just to build cities? If we can build a city with trees. Cut the trees of the space you need to built the building and save the others. Sometimes people acting more than the animals itself This is the sad and worst reality. That is hard to change