Switzerland City Lugano Gets Tons of Attention

Bitcoin uses as much energy as Switzerland, a new online tool from the University of Cambridge shows.

The tool makes it easier to see how the crypto-currency network’s energy usage compares with other entities.

However, one expert argued that it was the crypto-currency’s carbon footprint that really mattered.

Currently, the tool estimates that Bitcoin uses around seven gigawatts of electricity, equal to 0.21% of the world’s supply.

That is as much power as would be generated by seven Dungeness nuclear power plants at once.

Over a year, this equates to roughly the same power consumption as Switzerland.

“We want to use comparisons that set the narrative,” said the tool’s co-creator, Michel Rauchs, from the university.

“Visitors to the website can make up their mind as to whether it seems large or small.”

How does it work?

To “mine” Bitcoin, mining machines are connected to the crypto-currency network.

They are tasked with verifying transactions made by people who send or receive Bitcoin. This process involves solving puzzles.

The puzzles aren’t integral to verifying the movements of Bitcoin; they provide a hurdle to ensure no one fraudulently edits the global record of all transactions. As a reward for pitching into this system, miners occasionally receive small amounts of Bitcoin.

To make as much money from this process as possible, people often connect large numbers of miners to the network – even entire warehouses full of them.

That uses lots of electricity because the miners are more or less constantly working.

The University of Cambridge tool models the economic lifetime of the world’s Bitcoin miners. It uses an average electricity price per kilowatt hour ($0.05, £0.04) and the energy demands of the Bitcoin network. Finally, the model assumes that all the Bitcoin mining machines worldwide work with various efficiencies.

It is then possible to estimate how much electricity is consumed at any time.

BTC - BBC - Crest

University of CambridgeEnough to power one of the world’s oldest universities for a few more centuries

Bitcoin energy expert Alex de Vries, from accountants PwC, built a similar tool to estimate Bitcoin’s energy use last year.

He told BBC News that the most important thing was the carbon footprint of Bitcoin’s energy consumption.

That is, the emissions associated with the electricity resources used to power the crypto-currency. This varies from place to place, depending on energy supplies.

Despite its many proponents, Mr de Vries said that the Bitcoin network has an energy consumption problem. Despite processing fewer than 100 million financial transactions annually, it uses lots of energy.

He added that the number was “completely insignificant” in global terms. The traditional financial industry processes 500 billion transactions per year, he added.

Mr de Vries said that Bitcoin still uses far more energy per transaction than all the world’s banks put together when considering the amount of energy used by data centers.

The electricity used for Bitcoin produces about 22 megatons of CO2 annually, a study in the scientific journal Joule estimated. That is as much as Kansas City in the US.


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