Bitcoin and Energy: Is Mining Really an Ecological Disaster?
Bitcoin consumes more energy than some countries. This statement constantly appears in the media. But behind this shocking figure lies a far more nuanced reality. Recent data from Cambridge and scientific studies reveal a profound transformation in mining. What if Bitcoin is becoming an ally of the energy transition rather than an enemy?
TL;DR
- 52.4% of Bitcoin mining energy comes from sustainable sources (Cambridge 2025)
- Coal has dropped from 36.6% to 8.9% of the energy mix in 3 years
- Bitcoin consumes less than half the energy of the global banking system
- Flared gas mining reduces emissions by 63% compared to traditional flaring
- In Texas, miners stabilize the power grid and earn $30 million in curtailment credits
52% Sustainable Energy: Cambridge’s Figures
The most comprehensive study on Bitcoin mining energy comes from the Cambridge Centre for Alternative Finance. Their 2025 data shows a major transformation. 52.4% of the electricity used now comes from sustainable sources.
This figure breaks down as follows: 42.6% renewable energy (hydroelectric, wind, solar) and 9.8% nuclear. Hydroelectricity dominates at 23.4%, followed by wind at 15.4%. This proportion has increased by 15 points compared to 2022, when only 37.6% of energy was sustainable.
The most spectacular change concerns coal. In 2022, it represented 36.6% of the mining energy mix. In 2025, this figure has dropped to 8.9%. Natural gas has replaced it as the main fossil source at 38.2%. This transition from coal to gas significantly reduces the carbon footprint per kilowatt-hour.
Flared Gas Mining: Turning Waste Into Resource
One of the most promising innovations involves flared gas. During oil extraction, natural gas is often released as a byproduct. Without infrastructure to transport it, producers simply burn it into the air. This is called « flaring. »
In Texas’s Permian Basin, approximately $750 million worth of gas is wasted this way each year. This flaring emits methane, a greenhouse gas 80 times more potent than CO2 over 20 years. The problem: traditional flaring only burns 93% of the methane.
Companies like Crusoe Energy have developed an innovative solution. They install containers of Bitcoin miners directly at oil sites. The gas powers generators that produce electricity for mining. According to Braiins, this technology burns 99.89% of the methane.
The result? A 63% reduction in CO2 equivalent emissions compared to traditional flaring. Per megawatt installed, Bitcoin mining reduces emissions by 9,482 tons of CO2 per year. That’s 5 times more efficient than wind and 7 times more than solar for the same capacity.
Bitcoin vs Banks: Who Really Consumes More?
A study by Galaxy Digital compares Bitcoin’s energy consumption to that of the banking system and gold industry. The results are surprising.
Bitcoin consumes approximately 114 TWh per year. The global banking system (data centers, branches, ATMs, card networks) consumes 264 TWh. Gold extraction and refining reaches 241 TWh. Bitcoin therefore uses less than half the energy of these industries it aims to replace or complement.
Some more recent estimates from Hass McCook place banking consumption at 700 TWh. Bitcoin would then be 6 times more energy efficient. These comparisons have their limits: precisely measuring the banking system’s footprint remains complex. But they put criticism of Bitcoin into perspective.
Texas: When Miners Stabilize the Power Grid
Texas has become a full-scale laboratory for integrating Bitcoin mining into the power grid. Operator ERCOT manages a grid powered by over 30% renewables. The problem: wind and solar produce intermittently.
Bitcoin miners offer a unique solution. A 100 MW mining farm can go from full power to zero in minutes. No other industry can modulate its consumption so quickly. This flexibility is valuable for balancing the grid.
According to the EIA, approximately 1.53 GW of flexible load (mainly mining) participates in curtailment programs in Texas. During demand peaks or cold snaps, these miners instantly reduce their consumption. They free up electricity for homes and hospitals.
In return, they receive substantial credits. In Q3 2025, Riot Platforms earned $30.6 million in curtailment credits. That’s a 147% increase year-over-year. In August 2023, ERCOT paid $24.2 million to a single miner for their program participation.
Brad Jones, former acting CEO of ERCOT, summarizes: « Bitcoin mining operations have found a way to absorb excess wind during off-peak hours. » Mining becomes a grid management tool, not just a consumer.
Accelerating Renewable Energy Integration
Renewable energy suffers from an economic problem: curtailment. When solar or wind production exceeds demand, operators sometimes have to stop installations. This energy is lost.
In 2023, approximately 3% of ERCOT’s solar production was curtailed. A study published in ScienceDirect demonstrates that Bitcoin mining could use 93% of this wasted energy. The estimated benefit: $239 million in profit while making renewable installations profitable.
A Duke University study shows that 76 GW of new flexible load could be integrated into the American grid. That’s 10% of national peak demand. The condition: these loads must accept being curtailed 0.25% of the time. Bitcoin mining perfectly meets this criterion.
This symbiotic relationship benefits both parties. Miners access cheaper electricity during off-peak hours. Renewable energy producers find a guaranteed buyer for their surplus. The grid gains stability.
Energy as the Foundation of Security
Why does Bitcoin consume so much energy? The answer is two words: decentralized security. The Proof of Work mechanism transforms electricity into network protection. The more energy the network consumes, the more expensive it becomes to attack.
According to River, Bitcoin represents « one of the most direct transformations of energy into value. » This energy guarantees that no entity can falsify transactions or create money arbitrarily. It’s the cost of decentralization.
Proof of Stake systems like Ethereum consume 99% less energy. However, they rely on capital concentration rather than energy. Each model has its trade-offs. Proof of Work offers superior resistance to censorship and capture by wealthy actors.
What About France? The Nuclear Potential
France has a unique advantage: its nuclear fleet. French electricity is among the most decarbonized in Europe. Bitcoin mining powered by French nuclear would have minimal carbon footprint.
Discussions have emerged around a Bitcoin mining project in partnership with EDF. The idea: use excess nuclear production during off-peak hours. France already exports its electricity to its neighbors. Mining could offer an alternative for local value creation.
Conclusion: A Nuanced Assessment
Bitcoin is not exempt from environmental criticism. Its consumption remains significant at over 200 TWh per year. Nearly half still comes from fossil sources. Progress is still needed.
However, the data shows a positive trajectory. Coal is drastically declining. Renewables are advancing. Mining is integrating into power grids as a stabilization tool. Flared gas is finding utility. These developments are often ignored in public debate.
The question is not « Does Bitcoin consume energy? » but « Is this energy well used? » To secure a decentralized monetary network, resistant to censorship and accessible to 8 billion humans, energy consumption can be justified. Especially if it increasingly relies on sustainable sources.
Glossary
- Flaring: The practice of burning excess natural gas at oil sites, lacking infrastructure to transport it.
- Curtailment: Forced reduction of renewable electricity production when supply exceeds demand.
- ERCOT: Operator of the Texas power grid, managing 90% of the state’s electrical load.
- Hashrate: Total computing power of the Bitcoin network, measured in exahash per second (EH/s).
Frequently Asked Questions
What percentage of Bitcoin mining energy is renewable?
According to Cambridge, 52.4% of mining energy comes from sustainable sources in 2025. This includes 42.6% renewables (hydro, wind, solar) and 9.8% nuclear. This proportion has increased by 15 points since 2022.
Does Bitcoin consume more than banks?
No. According to Galaxy Digital, Bitcoin consumes approximately 114 TWh per year compared to 264 TWh for the global banking system. Bitcoin therefore uses less than half the energy of traditional banks.
How does Bitcoin mining reduce methane emissions?
By using flared gas from oil sites to power miners, 99.89% of methane is burned instead of 93% with traditional flaring. This reduces CO2 equivalent emissions by 63%.
Why do Bitcoin miners stabilize the power grid?
Miners can reduce their consumption within minutes during demand peaks. This unique flexibility allows electricity to be freed up for priority uses. In Texas, they participate in ERCOT’s curtailment programs.
Is Proof of Stake more ecological than Proof of Work?
Proof of Stake consumes 99% less energy. However, it relies on capital concentration rather than energy. Proof of Work offers superior resistance to censorship. Each model has its trade-offs. Learn more: What is a consensus mechanism?
Can Bitcoin mining become 100% renewable?
Technically yes. Miners seek the cheapest electricity, often excess renewables. Innovations like « photonic computing » could reduce consumption by 90%. The trend is clearly toward increasing sustainable sources.
Sources
This article is based on the following sources:
- Cambridge Centre for Alternative Finance – Bitcoin Energy Consumption Index
- Cambridge Judge Business School – Sustainable energy rising in Bitcoin mining
- Nasdaq / Galaxy Digital – Bitcoin vs Banking energy comparison
- Braiins – Mining Bitcoin with stranded gas
- U.S. Energy Information Administration – Data centers and crypto mining in Texas
- ScienceDirect – Bitcoin mining and renewable curtailments in Texas
How to cite this article:
Fibo Crypto. (2026). Bitcoin and Energy: Is Mining Really an Ecological Disaster?. Accessed on [date] at https://fibo-crypto.fr/en/bitcoin-energy-mining-ecology
📚 Glossary
- Bitcoin (BTC): The first and largest cryptocurrency by market cap.
- Cryptocurrency: A digital asset secured by cryptography on a blockchain.
- Blockchain: A distributed ledger recording transactions transparently.
