E-waste from every two bitcoin transactions is the equivalent of throwing away an iPad

 It’s no secret that cryptocurrency mining has a large carbon footprint. The process requires legions of electricity-hungry computers that work around the clock to unlock new coins by cracking math problems. Because these problems get increasingly complex over time, the system rewards energy waste: Any downtime makes the next coin harder to earn, and the only way to get an edge over competitors is to run more computers. And as the price of bitcoin rises—it was $47,318 on Sept. 19, below the peak above $60,000 reached in April—mining activity, and thus