by Newfie » Mon 17 Aug 2020, 08:48:56
A couple of things strike me as off.
Written in 2012 he projected world population to level off after reaching 8.1 billion in 2040. This growth rate is important because he uses in in following arguments. If it’s wrong then the other projections are effected.
So here we are just 8 years latter and checking ourworldindata they are estimating today’s population at 7.8 billion. And 9 billion by 2037. IIRC the UN projections have increased in recent years. Half of that increase coming from Africa.
$this->bbcode_second_pass_quote('', ' ')Based on this, the UN Population Division expects world population, currently (2020) at 7.8 billion, to level out at or soon after the end of the 21st Century at 10.9 billion (the median line),[4][5] assuming a continuing decrease in the global average fertility rate from 2.5 births per woman during the 2015–2020 period to 1.9 in 2095–2100, accordingto the medium-variant projection.[6]
https://en.m.wikipedia.org/wiki/Project ... ion_growthThe other thing is GDP. Is GDP a useful tool when such a large percentage of the population are doing no meaningful work? He makes the point that as an economy matures more and more folks turn away from primary production. But then bases GDP on population. Seems counter intuitive. Is it not possible to have a high population and a low GDP? Or visa versa? So I don’t know how valid these assumptions are.
Finally I don’t see much recognition of resource depletion. He says, more or less, we will eventually recognize how valuable it is and be more efficient and turn to desalinization. But by then the fossil water will be severely depleted and desalinization is very energy expensive.
But it is interesting seeing an original author of LTG changing his tune on the 40th anniversary. The 30 year report was quite bleak.