"The most exciting clean tech innovation of 2025? It might just be rust."
That was the assessment of Mark Loveridge, Commercial Director of Renewable Exchange, when asked about climate technology late last year. Six months on, the rust revolution he predicted has not just continued but gathered a momentum.
But what exactly was Mark referring to? The innovation in question was iron-air batteries, a deceptively simple but radically effective form of energy storage.
And, within the context of the energy transition, storage is the watchword of the moment.
The problem with renewable energy systems as things stand is that, unlike fossil fuels, renewable energies like solar and wind are difficult to store in the quantities we need.
