These companies claim blockchain could help fight climate change

Bitcoin, the much-hyped

cryptocurrency, made headlines recently for driving a surge in power use. Around the globe, digital entrepreneurs are ‘mining’ Bitcoins by solving complex math problems, using supercomputers to get the job done. Those supercomputers use a ton of power, which largely comes form coal- and gas-fired power plants spewing gobs of carbon pollution.
https://www.popsci.com/blockchain-climate-change