We live in a society that are headed towards a greener and more sustainable future. This demands that development of new technology is in line with this vision of a sustainable society. Blockchain consume enormous amounts of power today, with big miningfarms running continuously to maintain the networks of the various blockchains. In the wake of traditional blockchains, new alternative and innovative technology rises, which focuses on a sustainable solution. One of the most promising projects in the realm of sustainable solutions is IOTA, which I will elaborate on later in the article.