IOTA has a strong case for being one of the greenest cryptocurrencies, working with names likes Zebra Technologies and Jaguar Land Rover on projects tackling climate change

A 2020 peer-reviewed IEEE paper noted that one bitcoin transaction uses 651 kWh, while IOTA uses 0.00016 kWh, meaning IOTA is ~4 million times more energy efficient. Since then, Bitcoin’s power consumption has increased to 1120.16 kWh per transaction and IOTA has reduced its power consumption significantly with the recent Chrysalis network upgrade. (Note: This calculation only considers proof of work and does not take into account the power consumption of running an IOTA node, but its inclusion does not change the order of magnitude).

IOTA is doing all sorts of things in the green energy space. Here are a few of the highlights:

• IOTA is being used to digitize measurement, reporting and verification of sustainability performance (known as MRV) in Chile, funded by the Canadian governmenthttps://blog.iota.org/iota-and-climatecheck-launch-new-digitalmrv-solution-and-strategic-partnership-e3c4f55c8958/
• Jaguar LandRover and Engie are using IOTA to trace the path of energy from production in solar panels to consumption in electric vehicles in Trondheim, Norway - https://www.youtube.com/watch?v=erKiOoSiUBM
• IOTA is working with Zebra Technologies to improve efficiency in the supply chain and allow goods to travel more freely across borders - https://www.youtube.com/watch?v=v-4-4ZN88-k&t=2s
• IOTA has a long term collaboration with EIT Climate Kik, Europe's largest public-private innovation partnership focused on climate innovation, funded by the European Union - https://blog.iota.org/iota-foundation-and-eit-climate-kic-on-the-road-to-a-long-term-future/
• With a consortium within Norway’s dairy industry, IOTA is being used to provide transparency and efficiency in milk production, reducing methane emissions - https://blog.iota.org/using-the-tangle-for-smart-agriculture-the-iota-foundation-teams-up-with-future-farm-consortium-a9d1757e33c/https://future-farm.iota.org/#/
• A project called KupKrush is planning to use IOTA to reward people with IOTA tokens for recycling single use coffee cups - https://www.youtube.com/watch?v=v_9QCz0102k
• Another community project called Deposy is doing something similar - https://www.deposy.org/en/tackle-plastic-waste-with-iota/
• IOTA generally has a large focus on social impact and is currently working with Zebra Technologies to create verifiable Covid-19 vaccine and test certificates - https://blog.iota.org/digital-green-certificates-a-decentralized-and-interoperable-infrastructure

IOTA often gets forgotten about in these sorts of conversations. But the Tangle is feeless, lightweight and there are no miners. It is designed for use cases where data transparency and integrity are important, which is why it can support the sorts of things listed above.