Blockchain and Bitcoin, Big Buzz Words

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The Environmental Impact of Blockchain Technology

Cryptocurrency, Blockchain, Bitcoin, data mining, … These trending buzz words can be heard virtually everywhere: In financial discussions, the business world, universities and so many more instances.

But what do these terms actually mean? And how do they impact the climate crisis?

Back to Basics

In order to try and answer these questions, we need to gain a better understanding of the basics.

As a whole, cryptocurrencies, in contrast to traditional currencies, are not backed by tangible assets or securities – at least one part maintains real support.

They are digital currencies that are generally not issued by governments – therefore unregulated – and are secured by cryptography, a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it. It protects data from theft or alteration, but can also be used for user authentication.

Many of the cryptocurrencies are based on blockchain technology: “a distributed ledger enforced by a disparate network of computers”.

Cryptocurrencies are usually traded but can also be used to buy goods and services.

Bitcoin, the most popular cryptocurrency, has had very volatile prices, often losing or gaining in value in short periods of time. This volatility also presents several challenges, however it’s out of our article scope.

The Energy-Hungry Technology

Instead, we want to focus on the environmental impact of blockchain technologies that are the backbone of cryptocurrencies such as Bitcoin, Ethereum, XRP, Cardano or Stellar, among others.

For this, let’s take a look at how blockchain works. Simply put, it is decentralized and manages transactions and records them. Once recorded, data cannot be altered.

One aspect of this technology is the process of data mining, where the network of computers uses algorithms to confirm transactions.

The environment comes into play when looking at the high-speed computers that form part of the network. Naturally, these consume a huge amount of energy.

In fact, according to the University of Cambridge Electricity Consumption Index, if it were a country, the Bitcoin system alone would be the 34th largest consumer of electricity.

Criticism Is Increasing

This shocking fact highlights the environmental cost that is often overlooked.

However, public figures are starting to acknowledge the impact by refusing to accept Bitcoin as payment until the carbon footprint is improved.

Vitalik Buterin, the creator of the second largest cryptocurrency called “Ethereum” also mentions his concerns regarding the carbon footprint.

The True Cost of Cryptocurrencies

Now, someone who is very environmentally-conscious might want to defend trading cryptocurrencies by arguing that it could replace other types of currencies which may use a lot of paper for example.

Despite this argument, cryptocurrencies will most likely not replace traditional currencies in the near future.

Therefore, their environmental costs are simply on top of already existing emissions.

Additionally, bitcoin transactions consume a lot more energy compared to standard Visa transactions. In fact, one single Bitcoin transaction in 2021 is estimated to equal several hundreds of thousands of VISA card transactions.

As can be seen in the graph below, the difference is quite shocking

Depending on the source of energy that is used for the mining process, carbon emissions will arise. This is one of the main reasons why blockchain technology is threatening the global climate and needs to be based on renewable energy.

Unfortunately, even the use of renewable energy presents disadvantages. For instance, the technology might take away energy available to other, local communities.

Additional Environmental Issues

Crypto currencies also lead to electronic waste, as much singular purpose hardware is used in the process: this hardware becomes obsolete and ends up as waste.

Due to the competitive and racing nature of data mining, newer machines replace the “old” ones when they are more efficient.

This separate issue cannot be solved through generating renewable energy.

Change Is Needed

Finally, something should change – otherwise, this incredible technology has the potential of damaging the planet much more than it already is.

At times like these, sustainable developments should be achieved in all areas of life, and this technology is currently counter-productive to the desired goals.

But Now We Would Like to Know your Opinions:

  • Did you know about the ecological impact of Blockchain technology?
  • Have you ever traded a cryptocurrency?
  • Which revolutionary uses of Blockchain have you heard of?
  • Are cryptocurrencies the future? Or is it only a fad with an expiration date?


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  1. René

    I don’t think cryptocurrencies are necessarily the future, but surely very fascinating… Still, I am shocked to learn about their environmental impact!

    • Komoneed

      We do not know if it is the future either, but it is important that we take into account the environmental damage that is currently being done.

  2. Mekhi

    Blockchain and Bitcoin, Big Buzz Words – Im all for innovation, but is the environmental cost worth it? 🌍🤔 #GreenTechRevolution

  3. Keanu

    Sure, blockchain is trendy and all, but can we ignore its massive carbon footprint?

  4. Clementine

    Seriously? This kind of ignorance is mind-boggling. Its common knowledge that cool things often come at a cost. We need to prioritize the environment over our desire for instant gratification. Wake up and start taking responsibility for your choices. 🙄

  5. Jada Raymond

    Seems like blockchain is making a lot of noise, but is anyone really benefiting from it?

    • Skyler Allison

      Absolutely! Blockchain technology has revolutionized various industries, including finance, supply chain, and healthcare. It has enhanced security, transparency, and efficiency. Countless businesses and individuals are benefiting from it. Dont dismiss it just because you havent seen its impact firsthand.

  6. Rafael

    Who knew technology could be so destructive? Time to rethink our priorities. #SaveTheEnvironment

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