posted on Mar, 10 2014 @ 12:21 AM
reply to post by ZeussusZ
Here are the figures for projected world population growth from wiki ...
According to UN's 2010 revision to its population projections, world population will peak at 10.1bn in 2100 compared to 7bn in 2011. However,
some experts dispute the UN's forecast and have argued that birthrates will fall below replacement rate in the 2020s. According to these forecasters,
population growth will be only sustained till the 2040s by rising longevity but will peak below 9bn by 2050.
By 'peak' they mean after reaching that peak that the world population growth reduces to a minimum and therefor plateau's or goes into decline.
This suggests that others have already worked out what planet earth can actually sustain.
If we are generous with the future of projected growth forecasts then we can use the 10 billion figure.
If we want to play conservative with the future, then we can use the 9 billion figure.
The former figure equates to 1.5 acres max per person and the the latter figure equates to 1.3 acres max per person.
Neither of these figures, using the OP's max 2.3 acres per person figures, max out the potential available land to use.
I wondered why this may be and I discussed this thread with my gf and she pointed out that we need to leave some land for mother nature herself.
I suggest this is the reason that human growth maxes out at between 9 and 10 billion people some 36-86yrs in the future.
9-10 billion people = 9-10 billion acres used.
This equates to about 67% (2/3rds) of the habitable land, as used by mankind, compared with the roughly detailed 100% habitable surface area outlined
in the OP (15.6 billion acres) leaving 33% (1/3rd) the remaining land for mother natures use.
That is a very large footprint!
However one could simply employ a combination of vertical farming and hydro/aqua/air-ponics schemes to seriously increase the amount and types of food
produced and reduce ones footprint.
I recommend viewing the following ATS threads which detail such things more deeply ...
The Great Awakening
Guess Who Leads The Future Of Food? Surprise!
I hope this helps!