What are the limits of the Earth? What will happen when they are over? What alternatives do we have? What are the limits of the Earth? We have felt for decades that the planet’s resources are finite, but when will they end? What will happen when they are over? What alternatives do we have? Scientist and environmental science professor Johan Rockstrom of the Stockholm Resilience Centre was the first to define the nine planetary thresholds known today. If these thresholds were exceeded, life on the planet would not be sustainable. We are fully immersed in a new geological era known as the Anthropocene, in which the human footprint on the…