Earlier quoted context omitted.
> mining gold certainly has an environmental impact Can you quantify the environmental impact of gold mining? How does it compare to the CO2 output of a medium-sized country?
Looks like 0.8 tonnes / troy oz? https://www.spglobal.com/marketintelligence/en/news-insights... Given 3000 tons of gold mined per year, that should be roughly 70 megatons of CO2 / year. [I am pleased to report that this falls squarely in my previous estimate of 30-150 megatons / year that was based on the cost to mine gold, the cost of fuel, and the CO2 emitted by fuel.]
- so gold mining is 0.2% of global CO2 emissions!?
- Bitcoin mining energy use is at least 78TWh annually
- 480-500g of carbon dioxide produced for every kWh consumed
- So mining bitcoin produces 40 megatons of CO2 per year, which is the same order of magnitude of gold mining.
- And mining bitcoin is 0.1% of global CO2 emissions
(I would be grateful if someone would check my calculation)
References:
https://www.theguardian.com/technology/2021/mar/10/bitcoin-r...