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Bitcoin's future carbon footprint

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Listed:
  • Shize Qin
  • Lena Klaa{ss}en
  • Ulrich Gallersdorfer
  • Christian Stoll
  • Da Zhang

Abstract

The carbon footprint of Bitcoin has drawn wide attention, but Bitcoin's long-term impact on the climate remains uncertain. Here we present a framework to overcome uncertainties in previous estimates and project Bitcoin's electricity consumption and carbon footprint in the long term. If we assume Bitcoin's market capitalization grows in line with the one of gold, we find that the annual electricity consumption of Bitcoin may increase from 60 to 400 TWh between 2020 and 2100. The future carbon footprint of Bitcoin strongly depends on the decarbonization pathway of the electricity sector. If the electricity sector achieves carbon neutrality by 2050, Bitcoin's carbon footprint has peaked already. However, in the business-as-usual scenario, emissions sum up to 2 gigatons until 2100, an amount comparable to 7% of global emissions in 2019. The Bitcoin price spike at the end of 2020 shows, however, that progressive development of market capitalization could yield an electricity consumption of more than 100 TWh already in 2021, and lead to cumulative emissions of over 5 gigatons by 2100. Therefore, we also discuss policy instruments to reduce Bitcoin's future carbon footprint.

Suggested Citation

  • Shize Qin & Lena Klaa{ss}en & Ulrich Gallersdorfer & Christian Stoll & Da Zhang, 2020. "Bitcoin's future carbon footprint," Papers 2011.02612, arXiv.org, revised Jan 2021.
    • Handle: RePEc:arx:papers:2011.02612
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    References listed on IDEAS

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