I keep seeing statements both like "most electricity used to mine Bitcoin comes from fossil fuels" and like "Bitcoin is using 75% renewables". It seems like peo

I keep seeing statements both like "most electricity used to mine Bitcoin comes from fossil fuels" and like "Bitcoin is using 75% renewables". It seems like people just choose those that fits their agenda. I assume there really isn't a way to know what sources of energy Bitcoin mining is using, and how those sources were used if it wasn't for Bitcoin, right?