- The ECB highlights how Bitcoin’s energy footprint could be a concern and how they are nullifying greenhouse gas (GHG) emission savings by eurozone countries.
- The ECB compares the PoW blockchain consensus mechanisms to fossil fuel cars and the PoS consensus mechanism to electric cars.
Cryptocurrency prices plummeted in the second quarter of 2022! One area that continues to attract the attention of regulators is the contribution of digital assets to the carbon footprint. The European Central Bank (ECB) recently published a report emphasizing this issue.
Earlier this week, on July 12th, the ECB published a report entitled “Mining the environment – is climate risk in crypto-assets priced”? In the report, the ECB highlighted the “significant carbon footprint” of bitcoin and other digital assets. Basically, those Proof-of-Work (PoW) cryptocurrencies that require high computing power and thus a massive power requirement were highlighted. In the report, the ECB stated:
Some crypto assets like bitcoin and ether have a significant carbon footprint and are estimated to consume a similar amount of energy as some mid-sized countries each year.
The ECB also said that the annual consumption of bitcoin is surpassing that of individual countries such as Spain, the Netherlands and Austria. It also notes that the carbon footprint contributed by Bitcoin and Ethereum negates greenhouse gas (GHG) emission savings by eurozone countries.
Interestingly, the ECB officials compared the PoW blockchain consensus mechanisms to fossil fuel cars. They further argued that Proof-of-Stake (PoS) is the only sustainable crypto option while referring to electric vehicles.
PoW vs. PoS debate
Besides Bitcoin, the ECB also said that other cryptocurrencies like Ethereum etc. and even stablecoins like USDT are responsible for the carbon footprint. However, the Ethereum Foundation is working to transition the blockchain to a proof-of-stake consensus mechanism. The long-awaited merge event is expected to take place later this year.
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In addition, the ECB also recognizes two important initiatives undertaken by the crypto community to reduce its carbon footprint. These are the Crypto Climate Accord and the Bitcoin Mining Council (BMC). The first is the private-sector-led initiative, where over 200 supporters have helped achieve net-zero emissions by 2030.
The BMC, on the other hand, is a voluntary forum with currently 30 members. The BMC states that “Bitcoin mining consumes a negligible amount of energy, is rapidly becoming more efficient, and is powered by a higher mix of sustainable energy than any major country or industry.”
However, the ECB believes that such industry-led initiatives are voluntary in nature and are unlikely to result in any significant changes in BTC’s consensus mechanism. However, it is unlikely that Bitcoin advocates will support the move to proof-of-stake. They argue that the scalability of PoS technology comes at the expense of security and decentralization of the consensus mechanism.
“It’s hard to imagine how authorities could choose to ban gas cars during a transitional period while turning a blind eye to Bitcoin-like assets built on PoW technology,” the ECB adds.
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