Saturday, August 27, 2011

What is the carrying capacity of the Earth?


One question that arises frequently in discussion of energy and the Earth is “to what extent are humans responsible?” Basically, the research is there to indicate that since the first coal mine was opened up, levels of greenhouse gasses have increased and the climate has shifted in a negative manner. Dictionary.com defines the Earth’s carrying capacity as the maximum, equilibrium number of organisms of a particular species that can be supported indefinitely. [12] For a typical population, if the level of inhabitants exceeds the carrying capacity the population will decrease due to competition for resources. Once the population level is back near the carrying capacity, the competition will stabilize and numbers may again begin to increase. [13] For humans it’s difficult to simply explain this because we have so many technological advancements on a regular basis. However, is it possible that over the past couple hundred years we have done so much harm to our planet that it will never be the same again?


The Earth is currently 30 percent past the point where it would retain regenerative capabilities. This means that the regenerative capacity is lost, and most certainly is lost at least in part due to human activities. The following graph shows how the surface air temperature has risen over the years. [14]