Schwan, M.; Naikade, M. K.; Raabe, D.; Ratke, L.: From hard to rubber-like: mechanical properties of resorcinol-formaldehyde aerogels. Journal of Materials Science 50 (16), pp. 5482 - 5493 (2015)
If manganese nodules can be mined in an environmentally friendly way, the critical metals needed for the energy transition could be produced with low CO2 emissions