Chia's 'green' blockchain marketing hides carbon emissions 18x higher than the company's official claims.
April 16, 2026
Original Paper
Green by Design? Investigating the Energy and Carbon Footprint of Chia Network
arXiv · 2604.13044
The Takeaway
The industry narrative for Chia was 'Proof of Space and Time' as a low-power alternative to Bitcoin. This paper dismantles that, showing emissions actually exceed many other 'green' competitors by orders of magnitude. By analyzing the full hardware lifecycle and energy usage, the researchers found a massive 18x gap between reality and the company's PR. This exposes a systemic lack of transparency in how sustainability is measured in decentralized networks. For practitioners and ESG investors, this means 'low-energy' consensus mechanisms require far more rigorous auditing than just taking vendor claims at face value. It fundamentally changes how we assess the environmental cost of storage-heavy blockchain architectures.
From the abstract
This paper presents a detailed analysis of the environmental impact of Chia Network (Chia for short), a green-claimed blockchain, which uses a Proof of Space and Time (PoST) consensus mechanism. While Chia claims to be a sustainable alternative to Proof-of-Work-based blockchains, our results show that its resource-intensive initialization phase and ongoing operations lead to carbon emissions 18x higher than claimed (0.88 MtCO2/year), exceeding mainstream "green" blockchains by orders of magnitud