Libra, Facebookâs new cryptocurrency, is expected to have a smaller environmental footprint compared to some of its more notorious blockchain brethren, including bitcoin, according to experts. Its energy demands are projected to be more like those of existing data centers â" which, while still demanding, arenât quite as energy-hungry as mining bitcoins. The currency hasnât launched yet, so itâs hard to know how those claims will stack up against reality. But its design â" more centralized than most cryptocurrencies â" means that Libra will likely draw less energy. Unlike its more decentralized peers, only a few trusted members of the Libra Association, the centralized hub for the currency, can create Libra. âThis is an order of magnitude more efficient than bitcoin will ever be,â says Ulrich Gallersdörfer, a researcher at Technical University of Munich focused on blockchain research. Gallersdörfer was the co-author on a recent paper in Joule finding ...