Bitcoin’s growing energy problem: ‘It’s a dirty currency’

Its pollutant nature could crash its popularity. For years the environmental impact of cryptocurrency has been mostly overlooked by heavy-hitting environmental charities, governments and banks alike. But, after Elon Musk went from evangelist to critic referencing these very issues, the world is suddenly starting to take notice. Katie Martin and Billy Nauman investigate Bitcoin’s energy consumption and consider whether a greener alternative is possible.