Power Ledger (POWR)

Power Ledger is a decentralized network that helps users with crypto to make transactions. Despite previous crypto market crashes, the token, which was released in 2016, had a very high market value during the pandemic.

It is still one of the biggest cryptocurrency tokens today. But the majority of people are unaware that Power ledger is one of the most environmentally friendly tokens. Users receive access to a peer-to-peer platform that functions as a clean energy tracking and trading system with the help of its tokens. The tracking system helps to create more stable energy grids. Power ledger has also been working to reduce administrative procedures to provide a platform that is more user-friendly and energy efficient.

Cardano (ADA) (ADA)

The first peer-reviewed blockchain, Cardano (ADA), and it functions both as a currency and as a digital contract and DApps medium. 
In contrast to the Bitcoin blockchain’s 7 transactions per second, the Cardano network can process 1000 transactions per second. Many people think it has the ability to compete with the Ethereum network and was developed by Charles Hoskinson, one of the co-founders of Ethereum.

Why is Cardano a green cryptocurrency?

Cardano uses a proof-of-stake consensus, called Ouroboros.  Due to the fact that this was the first peer-review protocol for blockchain, and this makes ADA a sustainable cryptocurrency and one of the most popular ones too. 
The foundation for the Cardano network is setting it to scale at global requirements without sacrificing security, offering a transparent payment system, in an energy-efficient manner.

Algorand (ALGO)

ALGO, one of the most eco-friendly cryptocurrencies.
Algorand is a blockchain platform that supports smart contracts and uses proof-of-stake to make it scalable and safe. Pure PoS is accessible to anyone and consumes a lot less energy than other cryptocurrencies.

Why is Algorand a green cryptocurrency?

Algorand uses the proof-of-stake algorithm to validate blocks and does not involve mining, as it tries to lead the way to a sustainable blockchain network system.  When the project signed a partnership with Climate Trade, it pleaded to become the first blockchain that was carbon neutral.