Bitcoin mining has quietly shifted its energy base: hydropower now leads over natural gas as the main source powering the network, a milestone that would have seemed unlikely just a few years ago. Data from the Cambridge Centre for Alternative Finance shows this surprising change, which is part of a broader transition toward cleaner power in the industry.
Green energy gains momentum in Bitcoin mining
Between June 2024 and December 2025, Bitcoin’s electricity consumption climbed by 38%, reaching around 190 terawatt-hours annually. Despite this sharp rise in power use, emissions grew by only about 20%, highlighting the impact of a cleaner energy mix. Low-carbon sources now contribute nearly 60% of the total energy used for mining, up from 52.4% reported in April 2025. Hydropower's rise is the driving force behind this shift, overtaking natural gas as the largest single contributor.
Why this transformation matters beyond environmental pride
The environmental footprint of Bitcoin mining has long been a sticking point for adoption. Elon Musk’s 2021 decision to halt Tesla’s Bitcoin payments and the reluctance of ESG-focused investors stemmed largely from concerns about energy consumption. Regulators in the US and EU have proposed measures targeting crypto mining’s carbon footprint, including taxes and potential bans on proof-of-work mining.
With nearly 60% of mining powered by clean energy, such regulatory pressures could ease. This change also opens doors for institutional investors who have been hesitant due to environmental concerns. Mining companies tied to hydropower benefit from more predictable energy costs compared to those relying on natural gas, which fluctuates with geopolitical events and seasonal demand. This stability is critical for firms like Marathon Digital, Riot Platforms, and CleanSpark, whose valuations are closely linked to energy expenses.
Implications for the crypto market and investors
The improving sustainability profile may lead to less regulatory risk and smoother institutional entry into Bitcoin-related assets. As these developments unfold, market participants can expect more stable mining economics and a less contentious public perception of Bitcoin's environmental impact. At the same time, the overall surge in electricity consumption signals that energy demand remains a key factor to watch.
This content is for informational purposes and does not constitute financial advice.
