Clearly you don’t recognise the link in human terms between the two statements you’ve made and why they’re contradictory?
I was thinking of stress caused by over population though, this reduces sperm count as well, this helps keep most animal populations from expanding infinitely as well as many other factors, same applies to humans. And another thing is - population growth in the last 100 years is a lot down to better medicine, infant mortality reduction/ better crop and food production etc.
Of course the latter is correct but only because we humans cheat the system and have the ability to produce medicines, vaccines, antibiotics, etc to combat the natural controls of illness and diseases, that 100 years ago would have acted as the control on human global populations.
The list of illnesses and diseases that acted as serious controls on the human population that are no longer present or present infrequently is quite extensive.
Eg smallpox gone
Measles mostly gone in the western world
Malnutrition mostly gone from the western world
Flu pandemics which in 1918 - 1921 killed up 100 million people globally (3% of the global population), now kills less than 5 people in a 1000.
TB fully treatable in most cases and caught early enough.
Leprosy fully treatable if found early enough.
Blood poisoning/septic fully treatable.
Even malaria the world’s biggest kill we know how to eradicate it cheaply but needs the global will to do it.
And on and on the list goes.
But Mark in the rest of the animal world they do not have such cheating mechanisms, so their populations are limited by those illnesses and diseases they suffer from, which may well make some of them infertile.
You may also not accept that the predictions of 9 ½ billion by 2050 are correct and I’ve no doubts you’d have said the same in 1990 when the global population stood at 4.5 billion that by 2015 it wouldn’t be 7.3 billion. But the fact is that is the figure. We have added in the last 25 years 2.8 billion people to this planet. The trend whether you accept it or not based on the last 25 years factual increase is upwards with no signs of it levelling off.
So Mark, just may be those biased futuristic garbage peddlers are right. It would just, for once, be nice if you showed what evidence, facts you have to support your claims other than “your opinion” in the fishing pub!