Buying a Bitcoin emits 195x as much CO₂ as buying an iPhone

https://xkcd.com/386/

My hypothesis was that CO₂ emissions of cryptoassets are much lower than a large US tech company like Apple when adjusted by market capitalisation¹.

To work this out I decided to compare Bitcoin with Apple and Microsoft. While Ethereum is more relevant to NFTs, reports on ETH carbon emissions are scarce and tended to be proportional to Bitcoin anyway.

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