Yes, I agree. On the other hand, - we need concrete, steel and other similar materials to build the transition to clean energy. * - we need to be able to store

Yes, I agree. On the other hand, - we need concrete, steel and other similar materials to build the transition to clean energy. * - we need to be able to store (and ideally transport energy) from renewable, intermittent sources, such as solar, and sources that are hard to turn off/control, such as nuclear and wave power. Although this doesn't solve all the carbon emissions, concrete production accounts for >5% of carbon emissions IIRC and energy production a whole load on top of that, so if this can make a significant dent whilst stopping some of the other environmental side effects of drilling for Nat Gas, is this not a significant step forward? * The Material World by Ed Conway is a really interesting read that explores some of these tradeoffs