Salt, also known as sodium chloride, is a finite resource. A resource is only considered renewable if it is self-renewable. While natural processes in the soil create new salt, the timescale required for such generation is too long for salt to be considered self-replenishing in terms of human consumption.
Seawater dissolves the majority of the world’s salt supply. A crust of salt is left behind after seawater evaporates. This isn’t a brand-new salt; it’s just settled out of solution. While salt is a nonrenewable resource, it is also one of the most abundant minerals on the planet, with little chance of mankind running out.