Bitcoin and Energy

Few topics create more debate than Bitcoin's energy consumption.

Bitcoin secures its network through Proof of Work, which means real computers doing real work, and burning real electricity to do it.

That criticism is legitimate. By Cambridge's latest estimate, Bitcoin mining now draws somewhere between 170 and 180 TWh a year, roughly 0.7. 0.8% of global electricity consumption.

But most of the debate stops at that one number. It rarely asks the more useful question: where does that electricity actually come from?

Cambridge's most recent industry survey puts 52% of Bitcoin's mining mix on sustainable sources, nuclear and renewables combined, up from 38% in 2022. Hydropower alone supplies close to a quarter of the network.

Some of that energy isn't just clean. It's reclaimed.

Oil wells routinely flare natural gas they have no pipeline to sell. The world flared 151 billion cubic meters of it in 2024 alone, enough to power two-thirds of Europe. Companies like Crusoe Energy started plugging mobile data centers directly into those wellheads instead, mining Bitcoin on gas that would otherwise just burn into the sky. Crusoe alone has captured over 22 billion cubic feet of it, cutting emissions by an estimated 2.7 million tons of CO2. Cambridge now counts more than 500 MW of global mining capacity running on stranded gas like this.

So, can Bitcoin mining turn wasted energy into an economic resource?

In specific, documented cases, yes. But the answer still depends entirely on the site: the energy source, the location, the grid it's competing with.