No in fact it is not any of the above.
Do we all note those who say it is not a problem?
One of us, maybe more has a head for Mathematics, I clearly do not.
I have looked again at my efforts to get annual growth rate average .
And based only on that predict, with surely, how long after we reach 9 Billion to double that.
I think it is about[rough guess] 180 years, but may be wrong.
Bazz et al, with respect oil/food/ ext are symptoms of the problem, surely not the problem.
Runner,do you say growth can be endless? is your self assurance miss placed, do you read at all?
We see here a view that is against us acting, look at festers and others views.
Attack the mail man not the issue.
We must confront China has done it, we all can but all or nothing.
Why de population half the world so the other half can populate the whole?

Belly said;
I have looked again at my efforts to get annual growth rate average .
And based only on that predict, with surely, how long after we reach 9 Billion to double that.
I think it is about[rough guess] 180 years, but may be wrong.

The point I was making was that population will follow the availability
of energy to produce food. There would probably be a generation lag
in the response of population.

Liquid fuels are used to produce food as well as fertilisers.
The energy density of petrol and diesel gives such an advantage that
there is literally nothing that can be used instead.
I have suggested that tractors and harvesters and trucks could be
powered by overhead wires. Quite a job to do that on a 1000 hectare
farm, I am sure you will agree. Siemens are doing some work on that
for long distance trucks.
It will work but will need nuclear or coal fired electricity.

Have you noticed in all the chatter about closing Kurnell refinery
no one has suggested that they will not be modernising the refinery
because they will not have the crude oil to refine ?
We would be out of crude before they were finished.
Australian crude oil declined by 14% last year.
How long can we keep that up ?

The Shell refinery in Sydney is next and Brisbane is to follow.

Bazz I am afraid your focus on the end of oil is a bit out there.
Population growth bloke has nothing to do with oil.
Surely you know some large population centers use far less than the west? but produce far more humans.
Coal once fueled so very much, I am willing to bet few saw Oil taking its place.
And even fewer know with certainty what will replace oil.
I have avoided the taunts,that this subject is lefty propaganda trying to fill in for a lost? climate change debate.
Fact is the evidence is before us, no room for doubt, we are over populated and continuing to increase numbers much faster than before.
Capitalism, the only system we have that works, increasingly asks for increased productivity, wealth, growth, population.
At what point, it must happen, will it collapse?
Is dictatorship ahead or mass deaths world wide.
Closure of our oil refinery's is not related to shortage.
It is profit driven as our refinery's are old and not efficient.
Population too is driven by the need for increasing consumers and profit not the planets health.

Belly, if you don't believe me, will you believe Julia's government ?

http://www.crudeoilpeak.com/?p=1243

You can get the original document from the parliament house web site.
Population and oil production together followed an exponential growth
from late 1800 to today.
You said; Population growth bloke has nothing to do with oil.
It has everything to do with oil. For each calorie of food we eat it
takes 10 calories of oil to produce it !

These are inescapable facts and the implications are we are going to
need a major change in how the world operates.
You are right about how it will affect capitalism. There will be major
changes to the way we do business and most business will become local.

I will try and find that graph of oil & population for you.

Here we are Belly, this not the article I remembered but it is saying
much the same thing.
The implications of exponential growth are really mind boggling.

http://www.theoildrum.com/node/6924

http://www.futuredirections.org.au/files/1269848200-FDI%20Strategic%20Analysis%20Paper%2024%20February%202010.pdf
This link is complex, and does not support in full my view.
It in fact does quite the opposite, if you wish it to.
A warning of mass starvation starting some 40 years ago is in the link .
And we avoided that by the green revolution, increased food production.
An open mind will explore further the link shows clearly, under developed country's are the problem.
And not in the link but there if we look, are symptoms, not the problem.
Refugees, in big numbers for us , but small in compassion to what the potential is becoming.
The world seems to be heading for problems we can not begin to imagine.
Surely we can not sit back and say we are controlling our population so it is not our problem.
If we did? who would inhabit this world in 200 years?