Will owning bitcoins become a status symbol — or a scarlet letter for a new generation of climate-focused investors wise to the challenges it poses?The answer is complicated.Bitcoin supporters say that estimates of its carbon footprint are overstated. And if the computers that mine and help transact bitcoins are attached to an electric grid that uses wind and solar power, they add, mining and using it will become cleaner over time.“We believe that cryptocurrency will eventually be powered completely by clean power, eliminating its carbon footprint and driving adoption of renewables globally,” Mr. Dorsey of Square said in …
