When measured as a percentage of market worth, bitcoin mining has been compared to raising livestock or burning gasoline.
It is no secret that cryptocurrency mining consumes a lot of energy since it requires highly specialized computers and almost all the electricity it uses is produced by consuming planet-warming fossil fuels that are bad for the environment.
Mining Bitcoin, which accounts for around 41% of the global cryptocurrency market, making it the most popular digital currency, utilized more energy in 2020 than was utilized to supply electricity to entire countries such as Austria.
Bitcoin’s carbon footprint increases over time as different miners strive to validate transactions on the blockchain to generate new coins.
Since a growing amount of miners strive to solve more complex procedures, overall energy consumption grows.
As cryptocurrency investment develops in popularity, so does mining, and the more mining that occurs, the more electricity miners require, and the higher the carbon emission.
Bitcoin employs a proof-of-work (PoW) consensus mechanism, which refers to the technique of adding transactions to the blockchain by being the first to figure out a mathematical problem through computation.
This math challenge entails hashing a block of transactions until a specified output is obtained.
Since this is a one-way function, the same input will consistently end in the same output, but the input cannot be known only by the outcome.
Solving this math issue is akin to looking for a needle in a haystack. Miners that solve the riddle first are rewarded with newly generated Bitcoin, thus the competition.
According to KPMG, Bitcoin consumes around 110 terawatt hours of energy every year, which is similar to the amount of energy required to run tumble dryers.
The fundamental issue, however, is not the usage of energy, but rather the emissions related to its production, such as those from the combustion of fossil fuels.
It is useful to compare the emissions related to Bitcoin activities to the emissions of a variety of sectors and services.
Here are 4 ways Bitcoin Mining can reduce carbon footprint according to KPMG:
Renewable Energy
Bitcoin mining pools throughout the world split the block reward based on their computer power. The Bitcoin mining market has grown increasingly competitive since these specialized computers (ASICS) are readily available and create Bitcoin at the same pace regardless of location.
Miners are driven to optimize their operations while mindfully managing their production costs in this competitive environment.
Since power is the most expensive ongoing expenditure impacting operations, miners are continuously looking for the cheapest sources of electricity, which are frequently related to underused hydro, wind, or solar.
Wind and sun, on the other hand, have restrictions. The sun only shines for a portion of the day, and wind speed varies, frequently peaking in the evening.
Furthermore, renewable energy facilities are incentivized to produce at total capacity in order to deliver electricity in accordance with their contractual obligations.
This can result in utilities having an excess supply of electricity, which, when combined with a supply and demand mismatch, can result in low, or even negative, electricity rates.
Bitcoin miners can set up shop anywhere, including near renewable energy sources, which provide a flexible load that can function in tandem with supply and demand trends.
Demand Reaction
In addition to acting as a last-resort customer when demand is low, Bitcoin miners can act as a flexible load by participating in demand response systems that assist in regulating electrical grids.
This is made possible by the interruptible nature of mining operations, which can reduce their power usage at any time to provide that power back to the grid if demand surpasses available supply.
Recycled heat
While in an application, Bitcoin mining rigs, which are the specific hardware devices needed to execute the actual mining (e.g. ASICs), generate a substantial amount of heat.
Some Bitcoin miners have begun to use this heat to heat houses, business premises, greenhouses, and even swimming pools.
This often happens by co-locating next to a facility or greenhouse and hooking into the already present ductwork, that enables the miners to transport the heat generated, enabling these facilities to use existing heat sources.
Furthermore, using a heat exchanger can directly transmit heat from mining rigs to heat pumps for swimming pools.
Methane Reduction
Methane (CH4), a greenhouse gas emitted from a variety of sources including coal mines, landfills, and industrial activities such as oil and gas extraction, is one of the most significant contributors to climate change.
According to the United Nations Environment Programme, over a 20-year period, methane is roughly 80 times stronger than carbon dioxide (CO2) and responsible for around 30% of global warming consequences.
Instead of emitting methane directly into the atmosphere, it is sometimes burned, a practice known as gas flaring, which decreases the impact of direct methane emission.
According to a 2021 estimate, collecting the prospective energy of flared gas in the United States and Canada would be enough to power the entire Bitcoin network.
This has the advantage of both lowering emissions and establishing an additional cash source to monetize what would otherwise be unused energy.
The business harnesses vented methane that would otherwise have been discharged into the atmosphere to mine Bitcoin at municipal landfills. According to the United States Environmental Protection Agency (EPA), landfills account for roughly 14.3% of fugitive methane emissions in the United States.
Many have suggested that the EPA is underestimating this percentage due to an obsolete method of measuring methane emissions.
Bitcoin miners are developing new and creative ways to obtain power, which has decreased methane emissions into the atmosphere.
Bitcoin miners can be a helpful partner in the transition to more renewable energy sources while decreasing emissions due to their flexible demand load, ability to co-locate next to renewable energy sources, use of untapped energy sources, and capacity to help in reducing emissions despite their substantial power consumption.
Get the full report here.
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