How many Earths would it take to sustain my life?

How many Earths would it take to sustain my life? It’s this figure of seven global hectares that allows Wackernagel and his colleagues to calculate that it would take four Earths – or to be precise, 3.9 Earths – to sustain a population of seven billion at American levels of consumption. How many Earths would … Continue reading How many Earths would it take to sustain my life?