One definition of cryptocurrency is "digital money" that is generated and kept digitally with the use of cryptography. Decentralized and not controlled by any central body, Cryptocurrency is unlike traditional fiat currencies like the US dollar or the euro.
To create new units of cryptocurrency, such as Bitcoin or Ethereum, some computers perform a process called mining. Mining involves solving complex mathematical problems that require a lot of computing power and electricity. The first computer to solve the problem gets rewarded with newly minted coins and transaction fees.
Mining is crucial to the safety and reliability of the cryptocurrency network as a whole. Nevertheless, mining has serious environmental repercussions, which raises questions about its sustainability and social responsibility.
In this article, we look at 3 major environmental implications associated with cryptocurrency mining: energy usage, carbon footprint, and e-waste generation.
Energy Consumption
The most obvious environmental impact of crypto mining is the electricity required for the mining process. Digiconomist, a website that keeps tabs on Bitcoin's energy usage, claims that Bitcoin alone uses more energy yearly than countries like Argentina and Norway combined (more than 140 TWh). Energy usage is significant for all cryptocurrencies, not just Bitcoin.
The high energy consumption of crypto mining stems from two factors: the increasing difficulty of the underlying mathematical issues and the fierce rivalry between miners. For a consistent supply of coins, the difficulty level must rise as more miners join the network and more transactions are completed.
This necessitates the employment of application-specific integrated circuits (ASICs) or graphics processing units (GPUs), which are more powerful but also more energy intensive than regular computers, for mining.
Bitcoins Energy Consumption:
[source ] (https://www.researchgate.net/figure/Energy-consumption-index-for-Bitcoin-53_fig2_338154195)
Carbon Footprint
The carbon footprint of crypto mining depends largely on how electricity is generated in different regions where miners operate.
Some regions rely heavily on fossil fuels such as coal or natural gas, which emit high levels of carbon dioxide (CO2) when burned.
Other regions use renewable energy sources such as hydroelectricity, wind power or solar power, which emit little or no CO2 when used.
Cryptocurrency mining's carbon footprint seriously jeopardises efforts to restrict global warming to 1.5°C above pre-industrial levels, as agreed by most countries under Paris Agreement. By raising their demand and cost, cryptocurrency mining also reduces the advantages of adopting renewable energy sources.
E-Waste Generation
Since crypto mining technology has a very short lifespan and a high turnover rate, it produces a lot of e-waste. As mentioned earlier, miners must constantly upgrade their devices to keep up with the increasing difficulty level and competition. This necessitates frequent upgrading of their technology, typically every few months to a year.
According to a study by Alex de Vries and Christian Stoll, each Bitcoin transaction generates about 272 grams of e-waste, which is equivalent to throwing away two iPhone 12s. Depending on the mining method and technology used, other cryptocurrencies can potentially generate a lot of electronic trash.
Conclusion
As cryptocurrency becomes more mainstream and popular, it is important for everyone involved to be aware of these impacts and take actions to reduce them.
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