Interesting coincidence that articles are emerging in the Anglosphere round COP26 with similar take on demography but more informed by the 1970's ZPG Zero Population Growth movement?

The latter was based on sub-optimal research and data analysis, centred round Paul 'population bomb' Ehrlich and deceased white nationalist John 'passive eugenics' Tanton (muse of Steve Bannon and admirer of white Oz policy) with support of fossil fuels/auto to channel old eugenics tropes; help avoid climate science and environmental constraints.

UK's (related) Population Matter's Attenborough is promoting the notion that fossil fuels are only a conditional problem on the environment as it's because of 'population growth', but no 'solution', while many are still 'banging on about immigration'; COP'out26 aka Brexit?

For more recent and credible global demographic research Canada's Bricker & Ibbitson present their global in country research with local demographers, the public summary is 'Empty Planet' (2018). Based on broad demographer input, it explains fast declining fertility rates with most near or heading to below replacement, hence, predict peak population by mid century, then decline, but backgrounded by economic issues of supporting larger cohorts of retirees (others such as science journalist Fred Pearce see inevitable population decline as a solution and not precipitous).

The Centre for International Governance Innovation presented both in 'Empty Planet: Preparing for the Global Population Decline'; the last ten minutes they highlight how the UNPD and Paul Ehrlich keep predicting high numbers unlikely to occur. However, they do this without elaborating on the weird long standing relationship between the UNPD, population movement and in Oz the obsession with the UNPD designed NOM (described as 'nebulous' by UK journalist Ian Dunt); acts as our existential yet Trumpian 'wall' presented as an environmental (hygiene) solution.

https://www.youtube.com/watch?v=bSAgHvETNSg

It has been suggested elsewhere that Ehrlich's and Tanton's long game of 'architecture' of influence focusing upon 'population growth' was to delay constraints on fossil fuels and apply them to non European immigrants?

'Both of the latter have liaised with SPA and also related to Population Matters UK, Migration Watch UK, then Trump White House immigration restriction proponents FAIR, CIS and NumbersUSA.

9 Billion by 2035 according to WorldOMeter.

Worldometer uses same flawed UNPD data..... the latter is coming under question for always reaching inflated numbers.

Further, Australia cannot be compared with elsewhere as we collect data differently and it is inflated by, guess what? The NOM as defined by the same UNPD versus nations that cannot, do not or measure net migration via residency permits for foreigners (omitting citizens).

If one looks in the background of the UNPD there have been some very 'interesting' links with organisations and/or people from pre WWII, including Nazi Germany.....

Australia's ABS on future population forecasts, like the UNPD, throws in a googly i.e. the high flatline NOM of 200k+ into the future (dependent upon international students; no guarantee of high numbers), that keeps the raw population high; presently the pre and WWII oldies are passing through, next is the mother lode, baby boomer bubble.

Let's revisit in 5+ years......