Are cryptocurrencies more environmentally friendly?

As an individual concerned about the impact of financial systems on our environment, I must inquire about the environmental friendliness of cryptocurrencies. Given the vast amount of energy required for mining traditional cryptocurrencies like Bitcoin, does the overall cryptocurrency ecosystem possess a lower carbon footprint compared to traditional financial institutions? Are there emerging cryptocurrencies or blockchain technologies that utilize renewable energy sources or implement efficient mining mechanisms to minimize their impact on the environment? Are there any studies or reports that assess the environmental sustainability of cryptocurrencies, especially when considering their scalability and long-term viability? Clarifying these points would greatly assist in understanding the environmental implications of this emerging financial landscape.