The linked footprint network says that globally we're at a deficit of ~1 hectare per person, and because they're using 2019 figures for population, this is abou

The linked footprint network says that globally we're at a deficit of ~1 hectare per person, and because they're using 2019 figures for population, this is about 7.8B hectares total. Apparently the earth's land area is around 14.8B hectares, so the deficit is around 53% of all land. So ... E.O. Wilson's "Half Earth" proposal is in pretty close agreement, though he approached it from a species diversity lens.