Why it’s important to consider the environmental cost – Technology News, Firstpost

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Kenneth Kumar Mohanty Jul 07, 2021 9:24:10 IST

For Bitcoin enthusiasts, the good news first. It is reported that the difficulty of mining the world’s largest and most valuable cryptocurrency has just dropped by more than a quarter. Which means it’s now easier and more profitable to mine Bitcoins.

However, if one scratched beneath the surface, it would become evident that alleviating the mining difficulty is a move that is ultimately linked to the high environmental cost that the activity was considered to be extracting. Chinese authorities, which accounted for up to 65% of global Bitcoin production last year, cracked down on mining after it became clear that miners were using massive amounts of energy.

But what makes Bitcoin mining a concern for environmentalists? Here’s what you need to know.

What is cryptocurrency mining?

What makes Bitcoin unique is that it bears no resemblance to existing currencies, either in the way it is constructed or in how it works. For starters, although it is called Bitcoin, it is not a coin or any type of paper money, but simply lines of computer code. While conventional coins and banknotes are minted or printed in a currency, Bitcoins are created through a feature built into the operation of the network itself.

Bitcoin and other cryptocurrencies are called decentralized money. That is, they are not controlled by a central bank like, say, the Reserve Bank of India, which decides the monetary policy of the country. The RBI gives the banks instructions on everything from cash to interest rates and the banks in turn carry out the instructions and also keep track of the money you keep with them. When you withdraw money or spend money by card or digitally, the bank takes note and adjusts your balance accordingly. The people you transact with don’t know how much money you have in the bank as long as the transaction goes smoothly.

Transactions via Bitcoin are underpinned by blockchain technology and are tracked through the distributed ledger system. That is, all transactions on the Bitcoin network are visible to every computer that is part of the network and there is no central authority or bank that follows the movement of the cryptocurrency. How these transactions are verified and recorded is at the heart of blockchain and how Bitcoin is mined.

Why does mining require so much energy?

The Bitcoin network adds transactions to the distributed ledger in the form of blocks. These blocks are added to the previous blocks, thus creating the blockchain. But adding these blocks is not a simple matter of entering information and uploading it to the network, as it would mean that anyone could enter any amount into the general ledger and compromise its integrity.

To verify transactions and add new blocks to the blockchain, the Bitcoin network requires transactions to be verified first. This is where minors come in. You see, verifying Bitcoin transactions is a very complicated process requiring the cracking of a code, which gives these currencies the crypto prefix, which comes from cryptography, the art of writing or solving codes.

The code that needs to be solved before a transaction is included in a block and the block is added to the blockchain, however, is not straightforward and that is why miners need impressive computing power to break it. . And, to encourage dedication of the necessary computing power to verify transactions, miners are rewarded with Bitcoin. Mining, in short, is the process by which the Bitcoin ledger is maintained and new Bitcoins are created.

How much energy do miners use?

The only way Bitcoin miners can crack the code is through trial and error and reports say “the odds of fixing the problem are about one in 5.9 trillion.” Solving this problem allows miners to provide what is called in Bitcoin parlance a “proof of work” for which they can claim the reward. This is why the computers or processors that attempt to solve the Bitcoin puzzle have to run virtually continuously. And, because processors tend to heat up, they require large amounts of cooling.

The Bitcoin Electricity Consumption Index, managed by the Cambridge Center for Alternative Finance (CACF), indicates that if Bitcoin were a country, it would only have 41 countries ahead of it in terms of total annual electricity consumption. At 65.95 terawatt-hours (TWh), Bitcoin consumes more energy each year than Venezuela (65.65 TWh) or Israel (56.4 TWh).

How did it get easier to mine Bitcoin?

It had in fact become so difficult to mine for Bitcoins that miners began to use even more computing power and energy for this purpose. Because Bitcoin has continued to rise in value – despite some big swings – more and more people are signing up to the network, and even more people are now involved in mining the cryptocurrency.

But as China cracked down on mining rigs, this is what the processor collection is called, the Bitcoin network has now made changes to its algorithm that make mining of the currency easier. In fact, the computing power on the network, known as the hashrate, has fallen by more than 54% since May.

Since mining in China is likely off the grid, there are fewer miners, which means fewer transactions are verified. Reports have indicated that while it takes about 10 minutes to complete a block, the reduction in mining activity means it now takes between 14 and 19 minutes to add a block. This is why Bitcoin can adjust the difficulty level of mining blocks after adding 2016 blocks. But no one person or organization decides which algorithm to define, it would be managed by the network itself, given Bitcoin’s decentralization mantra.

But everyone from Tesla CEO Elon Musk to governments, think tanks and activists have pointed out how Bitcoin consumes so much energy. But an improvement in Bitcoin’s mining principle has already been proposed with new cryptocurrencies now adopting so-called ‘proof-of-stake’ protocols, which require people to have a stake in the blockchain to be able to verify transactions. By doing away with mining, Proof of Stake is expected to save a lot of the energy that is now spent on creating cryptocurrency tokens.

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