Is all of crypto a planet killer? Why is Bitcoin as bad as they say? Can blockchains be green? Let's find out together.

Get a quick overview of green blockchains - they exist, don't let anyone tell you otherwise!

How inefficient is Bitcoin really, when compared to existing payment systems, such as Visa Card transactions?

Why are some blockchains much more energy-efficient than Bitcoin on a per-transaction basis?

Avalanche, IOTA, and Solana - Are these three blockchains relatively energy efficient?

Bitcoin and many others: 👎Proof of work. Bad for the planet.
Modern blockchains: 👍Proof of stake. No wasted energy.
But which blockchains stand out as particularly green?


Recap: Not all blockchains are bad for the planet

We like to look at energy consumption per transaction.
Think of it this way: How much energy does it cost each time you swipe your credit card?


What does “green blockchain” even mean?

Just 1 Bitcoin transaction uses the energy equivalent of… 🥁
1.5 million VISA card payments… 🤯 

For context: Bitcoin is crazy bad

IOTA, Solana, and Avalanche use very little energy. They are all “proof of stake”.
Celo and Algorand do even more: they donate towards climate change, like projects that plant trees.


Here are some examples of eco-friendly blockchains

How cool is that? They actually HELP the planet. 
Try to convince MasterCard or Morgan Stanley to do that. 💰


“Climate negative” blockchains exist!

We think: Yes. We should all care to preserve our natural resources.
But there are other benefits to energy-efficient blockchains: They are also much faster and scale better. And that’s a major accomplishment, check out our course on the blockchain trilemma to learn more!


Should you care? There are other benefits.

Bitcoin and other Proof of Work chains use excessive amount of energy because of Proof of Work (yes, we know you get it by now)
But Proof of Stake based blockchains use much less energy
Bigger examples are Algorand, Avalanche, Celo, IOTA, and Solana but there are many more
Some (like Algorand and Celo) even contribute positively to the environment