Au Has been a valuable asset for millions of years, and the techniques of acquiring and exchanging it have evolved markedly over the years. In ancient societies, gold was often used as a type of money. People would exchange Au pieces for goods and services, which made it a key https://pamela849j0g.national-wiki.com/1325127/examining_the_ecological_and_economic_impacts_of_mining_methods_on_worldwide_au_supply_chains