Creating sustainable futures/CSF102/Understanding the challenge/Funnel-model

"Our current ecological and economic crisis stems from our dependence on cheap and abundant energy; turning fossil fuels into a double-edged sword. Although our actions have lifted our civilization to new heights, it has come at a tremendous price. We are now at a point where humanity's demands for natural resources far exceed the earth's capacity to sustain us. The extraction and the use of those resources in the past two centuries have changed our climate and ecosystems so significantly, that a new geological era had to be created."