>GreenNFT/Green NFTs - A Study on the Environmental Impact of Cryptoart Technologies. Key Takeaways: The most important conclusions of the paper are:- 1 . The impact of a transaction does not depend only on the gas used, but is instead proportional to the transaction fee; 2. Spending 1 dollar on transaction fees on Ethereum is equivalent to emitting at least 1.115 kgCO2eq; 3. A blockchain with full blocks pollutes more than one with empty blocks; 4. The single most effective action that a user can take to reduce their own impact is to pay a reasonably lower gas price; 5. Variations in the price of Ether influence the greenhouse gas emissions of the Ethereum network; 6. As of early May 2021, Ethereum emits 24.76 MtCO2eq per year; 7. EIP-1559 is expected to reduce global Ethereum emissions by about a third; 8. Using Layer 2 technologies significantly reduces the impact of transactions; 9. Transitioning to Proof of Stake remains the best long-term solution for Ethereum. [https://github.com/lucadonnoh/GreenNFT/blob/main/Green%20NFTs%20-%20A%20Study%20on%20the%20Environmental%20Impact%20of%20Cryptoart%20Technologies.pdf](https://github.com/lucadonnoh/GreenNFT/blob/main/Green%20NFTs%20-%20A%20Study%20on%20the%20Environmental%20Impact%20of%20Cryptoart%20Technologies.pdf)