ecoscience was published in 1977 and the authors had not predicted the tech. advancement that was able to support increased population ...
but there is a limit to populations that this machine called 'earth' can sustain ... i think population should never exceed 9 or 10 billion
and most scientists, academics agree that 'zero population growth' is the ideal that we should all aim for ... which is around 2% right now but i guess would decrease in the future