Blockchain infrastructure developer Blockstream has partnered with Macquarie Group, an Australian multinational investment bank, to launch a new pilot for a Bitcoin (BTC) mining facility with a mandate to explore carbon-neutral alternatives.  As part of the pilot project, Macquarie Group is investing in one of Blockstream’s enterprise-grade mining facilities, the companies announced Wednesday. This will allow Macquarie Group to uncover new opportunities in renewable energy that can be bootstrapped for more sustainable Bitcoin mining initiatives.  Macquarie Group is one of the largest institutional investors in the renewable energy infrastructure, with 44 gigawatts of generation under development or construction as of March 31, 2021.