Sweden Calls for EU Ban on Proof-of-Work Crypto Mining

Swedish financial and environmental regulators are calling on the European Union to implement a bloc-wide ban on "proof-of-work" (PoW) cryptocurrency mining, arguing that its energy demands threaten the region's climate goals [1]. The move follows a significant increase in mining activity in Nordic countries after China's crypto crackdown, with Sweden reporting a "several hundred per cent" surge in Bitcoin mining between April and August 2021 [1].

Rising Energy Concerns in Europe

Erik Thedéen, director of the Swedish Financial Supervisory Authority, and Björn Risinger, director of the Swedish Environmental Protection Agency, highlighted that crypto mining now accounts for electricity consumption comparable to 200,000 households in the region [1]. They argue that this energy use is not a "reasonable use of our renewable energy" and impedes Sweden's ability to meet its Paris Climate Agreement commitments [1]. The regulators also seek a complete ban on new crypto mining operations within Sweden itself [1].

The "proof-of-work" system, used by major cryptocurrencies like Bitcoin and Ether, involves computers solving complex mathematical equations to verify transactions, a process that becomes more energy-intensive as transaction volumes rise [1]. This system creates competition among miners, with those possessing faster computing power and energy sources having an advantage [1].

Broader European Stance and Global Context

The EU has expressed increasing concern over the energy consumption of information and communication technologies, including crypto mining, particularly in the wake of the invasion of Ukraine [2]. The European Parliament nearly passed legislation earlier this year that would have restricted PoW mining to encourage a shift to less energy-intensive "proof-of-stake" (PoS) methods [2]. Swedish regulators specifically favor banning the trading of PoW assets [2].

The surge in mining activity in Nordic countries, including Sweden, is partly attributed to miners relocating after China banned crypto mining in late 2021 [1, 2]. This ban led to an exodus of miners seeking cheaper energy sources, with Kazakhstan experiencing significant energy demand spikes and subsequent blackouts and protests due to the influx of unregistered "grey miners" [2]. Kazakhstan's government claimed crypto miners accounted for 8% of the country's energy capacity, leading to internet shutdowns and rationing measures [2].

While Bitcoin mining's global energy consumption is comparable to small countries, and its annual consumption (129 TWh/y) is nearly on par with gold mining (131 TWh/y), the proportion of that energy derived from carbon-based sources is a key consideration [2]. The Bitcoin Mining Council, an industry forum, has committed to making the energy mix more sustainable [2].

What to watch

• EU Regulatory Response: Monitor any official statements or legislative proposals from the European Union regarding a potential bloc-wide ban or restrictions on proof-of-work crypto mining.
• Energy Grid Stability: Observe reports on energy consumption and grid stability in European nations, particularly Nordic countries, as winter approaches and energy demands typically rise.
• Mining Relocation Trends: Track any further shifts in global crypto mining operations, especially if European countries implement stricter energy regulations.

The debate highlights a growing tension between the expanding energy demands of proof-of-work cryptocurrency mining and Europe's commitments to climate goals and energy security.