When did humans start altering Earth?

The ArchaeoGlobe Project assessed knowledge on human land use over the past 10,000 years, through the contributions of more than 200 archaeologists. It concluded that, by 3,000 years ago, most of Earth was already transformed by hunter-gatherers, farmers and pastoralists. Source: https://earthsky.org/human-world/when-humans-start-altering-planet-earth-anthropocene…