Cement manufacture is a huge carbon emitter. A by-product of splitting seawater might make the process more environmentally friendly.

Seawater electrolysis with CO2 injection enables sustainable synthesis of carbon-trapping minerals like CaCO3 and Mg(OH)2.

It is already possible to use seawater to produce hydrogen. Proven processes such as reverse osmosis can be used to purify seawater for "normal," commercially available electrolyzers. From a ...