Planet Earth
What is the number of people planet earth can really sustain?
There’s around 6 billion people on planet earth. Is it too much for a planet like earth to contain? With all its limited resources, bass and mass and taking every other thing into account, what is the number of people earth was actually born to sustain?
Every two years the United Nations commissions a report on long term world population projections — Here’s a piece out of the executive summary in the 2004 version of their 240 page publication “The World Population to 2300″:
In these projections, world population peaks at 9.22 billion in 2075. Population therefore grows slightly beyond the level of 8.92 billion projected for 2050 in the 2002 Revision, on which these projections are based. However, after reaching its maximum, world population declines slightly and then resumes increasing, slowly, to reach a level of 8.97 billion by 2300, not much different from the projected 2050 figure. This pattern of rise, decline, and rise again results from assumptions about future trends in vital rates: that, country by country, fertility will fall below replacement level—though in some cases not for decades—and eventually return to replacement; and that, country by country, life expectancy will eventually follow a path of uninterrupted but slowing increase. With alternative assumptions about fertility, long-range trends could be quite different. With long-range total fertility 0.3 children above replacement, projected world population in 2300 is four times as large as the main projection; with total fertility 0.2 children below replacement, world population in 2300 is one-quarter of the main projection. Regions and countries will follow similar demographic paths in the long run, given similar assumptions for different countries about longrange vital rate trends. However, because initial assumptions differ, and because this gives rise to slight variations in trends, countries and regions will not be exactly alike, even by 2300. In fact, what are today considered more developed and less developed regions will still be demographically distinguishable, with regard, for instance, to life expectancies and proportions at advanced ages. In addition, regions and countries will go through critical stages of growth—zero growth, subreplacement fertility, a return to positive growth—at different points in the future, giving rise to a global demographic map with areas that shrink and stretch at different times in the next three centuries.
The Secret – Planet Earth
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