Cryptocurrencies are known to be energy-intensive, yet they may also be less polluting.
It is hardly surprising that cryptocurrencies, which were once considered arcane, have now entered the mainstream, with an estimated 320 million users globally. These profitable alternative currencies are made possible by security, the convenience of transactions, and exponential profits. The drawbacks, however, are significant, with crypto mining’s negative effects on the environment standing out as one of the most obvious.
Energy guzzling currencies
From 2018 to 22 “annualized power demand from worldwide crypto assets surged dramatically, with predictions of electricity usage doubling to quadrupling,” according to research published by the White House. According to published estimates, as of August 2022, “the total annual electricity usage for crypto-assets is estimated to be between 120 and 240 billion kilowatt-hours, which is equivalent to 0.4% to 0.9% of the total annual electricity usage of many individual countries, such as Argentina or Australia.
This is concerning since a significant amount of electricity comes from burning fossil fuels like coal, which, according to the White House, “may result in greenhouse gas emissions, as well as extra pollutants.” Bitcoin and Ethereum (ETH) are the two most well-known cryptocurrencies in the world, accounting for 60% of the market capitalization of all cryptocurrencies. The analysis estimates that by August 2022, Bitcoin will be responsible for 60–70% of the energy used by all digital assets worldwide, while Ethereum will be responsible for 29–39%. Switching to more environmentally friendly technology, such as proof-of-stake, has been advised since it “may lower the entire power use to less than
Ethereum merge
On September 15, Ethereum completed the merging, which was one of the most eagerly awaited developments in the web3 ecosystem. It replaced the energy-intensive proof-of-work process on the Ethereum blockchain with proof-of-stake. And we completed it! To everybody, a happy merging. This is a significant milestone for the Ethereum ecosystem, tweeted Vitalik Buterin at the time. In another tweet, he cited “Ethereum researcher” Justin Drake and claimed that the merger will lower global power use by 0.2%.
Bitcoin employs the proof-of-work algorithm, in which users mine money by utilizing powerful computers to solve challenging mathematical puzzles. This process consumes a lot of energy. The Ethereum event was referred to as merging as early as December 2020. It initially operated on two parallel blockchains: the Ethereum Mainnet, a heritage blockchain that utilized proof-of-work, and the Beacon Chain, a new blockchain that used proof-of-stake. Through the merging of Ethereum Mainnet and Beacon Chain, a single proof-of-stake blockchain was produced. In this, before verifying transactions, miners make a guarantee of investment in the virtual currency. They need to stake their coins in order to validate blocks.
The validator who gets to add the following block to a blockchain is then selected by an algorithm depending on the amount of bitcoin she has pledged. Although this eliminates the need for fast, energy-intensive computers to solve difficult systems, it requires a significant investment. Therefore, individuals with the greatest money may be in a better position. For instance, to become a validator, a stake of at least 32 ETH is required. But because one ETH is worth $1,300, the entire investment comes to $41,600, making it expensive. Because Ethereum completely switched to a proof-of-stake method after the merging, it is now more appealing to those who care about the environment. Before the merger, its yearly power usage was equal to Finland’s, and its carbon footprint was equal to Switzerland’s.
