Re use of water in lithography: it became necessary at 90 nm level (~2004), so it is not exactly new. Water is used to bend light. (Isn't it amazing?) https://

Re use of water in lithography: it became necessary at 90 nm level (~2004), so it is not exactly new. Water is used to bend light. (Isn't it amazing?) https://en.wikipedia.org/wiki/Immersion_lithography https://en.wikipedia.org/wiki/Immersion_lithography While this use requires extreme purity, it is not a big use in terms of volume.