Bitcoin can actually be used to aid growth in rewewables and mitigate carbon emissions. A couple examples: (1) "bitcoin batteries" which can be a reliable consumer of renewable energy during otherwise low-demand periods and (2) replacing natural gas flaring with bitcoin mines.
https://www.prnewswire.com/news-releases/layer1-launches-bit...
https://www.crusoeenergy.com/news-and-media/2020/1/10/denver...