Earth's crust: not quite the same as Cu/Zn but way more than I expected: https://periodictable.com/Properties/A/CrustAbundance.an.html https://periodictable.co

Earth's crust: not quite the same as Cu/Zn but way more than I expected: https://periodictable.com/Properties/A/CrustAbundance.an.html https://periodictable.com/Properties/A/CrustAbundance.an.htm... Lithium: 0.0017% Copper: 0.0068% Zinc: 0.0078% Seawater: https://sciencenotes.org/abundance-of-elements-in-earths-oceans-periodic-table-and-list/ https://sciencenotes.org/abundance-of-elements-in-earths-oce... Lithium: 0.18 mg/L