Descripción de Crash Course: Chapter 18 - Environmental Data by Chris Martenson:
Chapter 18 - Environmental Data: The entire human population reached three billion in 1960, and today more than twice that number of people live on earth with rapid growth expected to continue in the future. Unfortunately, an increasing population increases the demand for earth's natural resources. In this chapter, Dr. Chris Martenson explains that since the easiest-to-extract, most abundant natural resources are extracted first, our growing population will have to deal with scarce, energy-consuming, low-grade resource availability in the near future. http://www.chrismartenson.com
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