The most criticized issue in the development of cryptocurrency has been the excessive electricity consumption by miners for computing operations. Virtual currencies have even been labeled as "energy killers." However, a major reform planned for Ethereum in the future is expected to fundamentally address this significant drawback.
Why Does Crypto Mining Consume So Much Power?
The primary reason for the high energy consumption in crypto mining lies in the "consensus mechanism" of virtual currencies. Currently, both Bitcoin and Ethereum use Proof-of-Work (PoW) as the rule that miners must follow. This mechanism relies on consuming electricity and energy to reflect the amount of work individual miners have contributed to the blockchain, thereby calculating their rewards.
According to data, the energy cost per transaction for Bitcoin is a staggering 1,135,000 Wh. For Ethereum under PoW, it is only about 1/15 of that, approximately 84,000 Wh. However, these figures are still equivalent to the total electricity consumption of a medium-sized country. Both BTC and ETH continue to face criticism for being "not environmentally friendly."
The Shift to a More Efficient Mechanism
Not long ago, Ethereum announced its plan to upgrade to Ethereum 2.0 in the future. The blockchain will gradually transition miners' consensus mechanism from PoW to Proof-of-Stake (PoS), also known as holding amount proof, to reduce unnecessary energy consumption.
Several months after the launch of the Beacon chain in ETH 2.0, the Ethereum Foundation provided a noteworthy figure highlighting the vast difference in energy utilization between PoW and PoS.
The Ethereum Foundation pointed out that the energy cost per transaction for Ethereum under PoS is a mere 35 Wh. This efficiency is 2,000 times higher than the current PoW-based ETH and an astonishing 7,000 times more efficient than Bitcoin. The total energy consumption of the entire network is reduced by at least 99.95%. To put it in perspective, 35 Wh is roughly the amount of electricity an average person uses while watching television for 20 minutes.
Although Ethereum currently still uses PoW, this situation is expected to change soon. The merger of ETH 1.0 and ETH 2.0 is speculated to be officially launched by early 2022 at the latest. Once completed, ETH will no longer be an energy-intensive cryptocurrency. The Ethereum Foundation also plans to implement additional measures to further reduce energy consumption and achieve economies of scale.
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Frequently Asked Questions
What is Proof-of-Work (PoW)?
Proof-of-Work is a consensus mechanism where miners solve complex mathematical problems to validate transactions and create new blocks. This process requires significant computational power and energy consumption.
What is Proof-of-Stake (PoS)?
Proof-of-Stake is an alternative consensus mechanism where validators are chosen to create new blocks based on the number of coins they hold and are willing to "stake" as collateral. It is far more energy-efficient than PoW.
How much energy will Ethereum save after switching to PoS?
The transition to PoS is expected to reduce Ethereum's energy consumption by at least 99.95%, making it 7,000 times more energy-efficient than Bitcoin.
When will Ethereum fully transition to PoS?
The merger of ETH 1.0 and ETH 2.0 is anticipated to be completed by early 2022, marking the full transition to PoS.
Why is reducing energy consumption important for cryptocurrencies?
Lower energy consumption makes cryptocurrencies more sustainable, environmentally friendly, and scalable, addressing one of the major criticisms of the technology.
Can other cryptocurrencies adopt similar mechanisms?
Yes, other cryptocurrencies can implement PoS or hybrid models to improve energy efficiency. However, the transition requires careful planning and community consensus.