Understanding your climate impact.

We provide data on the carbon exposure of investments and business activities in the field of cryptocurrencies and beyond.

Bitcoin coin infront of a blurry background.

Upcoming: Cryptocurrency Sustainability Dashboard

Building on CCRI’s Cryptocurrency Sustainability API, the Sustainability Dashboard features unique insight into GHG emissions emissions of the most important cryptocurrencies as well as additional key metrics. Join our mailing list and stay updated on the Dashboard launch.

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Our Offering

We at the Crypto Carbon Ratings Institute assist companies in the crypto space in understanding and managing their climate impact. Our approaches root on a sound data basis and span across all layers of technology and business.

Cryptocurrency Sustainability API

CCRI’s Cryptocurrency Sustainability API provides data on the climate impact of cryptocurrencies, tokens and respective activities. Our methodology is based on a hybrid approach which takes into account the carbon exposure of holdings and transactions. We cover:

  • Proof-of-Work currencies: Bitcoin, Ethereum, Litecoin, and more!
  • Proof-of-Stake currencies: Cardano, Avalanche, Solana, and more!
  • Layer-1 tokens: Uniswap, Chainlink, and more!

Our API already covers a wide range of tokens and functionalities but remains in constant development and is regularly expanded.

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Scientific Estimates

Provided data are based
on state-of-the-art research.

Multiple Tokens

More than 25 currencies and
all ERC-20 tokens on Ethereum.

Holistic Perspective

CCRI's methodology supports
layer 1 and layer 2 activities, including NFTs.

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Green Corporate Strategies

A sound data basis can serve lots of purposes. We assist companies in leveraging our data for their customers, business activities and climate strategies. This also includes going beyond crypto-related investments and activities. Thus, we support our customers in gaining a understanding of their company’s carbon impact across all scopes of emissions.

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Our Team

We are a research-driven and interdisciplinary team combining academic knowledge from various fields.

A picture of Uli Gallersdörfer
Uli Gallersdörfer
Co-founder and CEO

Background in informatics and blockchain technology.

A picture of Lena Klaaßen
Lena Klaaßen

Background in climate finance and carbon accounting.

A picture of Christian Stoll
Dr. Christian Stoll

Background in energy markets and climate economics.


Below we provide a list of our published research and white papers.

  • de Vries, A., Gallersdörfer, U., Klaaßen, L., & Stoll, C. (2022).
    Revisiting Bitcoin’s carbon footprint.
    Joule, https://doi.org/10.1016/j.joule.2022.02.005
  • Crypto Carbon Ratings Institute (2022).
    Energy efficiency and carbon emissions of PoS Networks.
    Industry Report.
  • Gallersdörfer, U., Klaaßen, L., & Stoll, C. (2021).
    Accounting for carbon emissions caused by cryptocurrency and token systems.
    arXiv preprint arXiv:2111.06477.
  • Klaaßen, L., & Stoll, C. (2021).
    Harmonizing corporate carbon footprints.
    Nature communications, 12(1), 1-13.
  • de Vries, A., & Stoll, C. (2021).
    Bitcoin's growing e-waste problem.
    Resources, Conservation and Recycling, 175, 105901.
  • de Vries, A., Gallersdörfer, U., Klaaßen, L., & Stoll, C. (2021).
    The true costs of digital currencies: Exploring impact beyond energy use.
    One Earth, 4(6), 786-789.
  • Gallersdörfer, U., Klaaßen, L., & Stoll, C. (2020).
    Energy consumption of cryptocurrencies beyond bitcoin.
    Joule, 4(9), 1843-1846.
  • Stoll, C., Klaaßen, L., & Gallersdörfer, U. (2019).
    The carbon footprint of bitcoin.
    Joule, 3(7), 1647-1661.
Please let us know if you cannot access the full version of an article.


Discover client references
on the work of the Crypto Carbon Ratings Institute.