Timelapse – Google Earth Engine
How Many People Should the Earth Support? - EcoFuture
Unknown to most people, species are tuned by natural processes, over immense periods of time, for parents to produce (on average) only a sufficient number of surviving offspring to replace themselves -- meaning two. Ancestral females of our species evolved the ability to have over a dozen children in their short lives -- a necessity under high levels of mortality. Around 20,000 years ago, there was an estimated world population of three million people, which likely had a negligible effect on their surroundings. To ensure tribal survival and integrity, customs and spiritual beliefs of our ancestors became ingrained with the concepts of large families and dominion over all other life.
Glossary - PBS: Public Broadcasting Service
By the year 2050 (within our children’s lifetime), it is anticipated that the burgeoning human population will level off between 11 and 15 billion, driving over 25% of the Earth’s remaining wildlife into extinction (Wilson 1992). The World Wildlife Fund believes one-third of all plant and animal species could be gone within 20 years. We are now losing wildlife at the rate of 75-100 species per day (Wilson 1992), squandering through ignorance and greed a 3.6-billion-year heritage of life on the planet. All these unique life forms are our kin; all of us traceable back over 3.6 billion years of evolutionary history to a common ancestral stock.