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Mitch SMith

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What are our true global economics?

I recently saw an estimate that human population is currently consuming 1.5 times the carrying capacity of the Earth.

This suggests that the resources we use - the plants and animals and energy required to keep us alive are generated by the planet ecology.
It suggests that the system, if left to itself, has a capital represented by sunshine, air, water, plants and animals.

It suggests that the carrying capacity for humans is like the "interest" on the global "capital"
The inference is that we are harvesting more than the interest and are well into the capital - harvesting at an exponential growth rate.
In other words, having eaten everything on the farm, we are now eating the farm. And there will be no more "interest" becasue there will be no more capital.
Like our global bank account is in free-fall.
One dimension of the assertion is that, by mass, the nitrogen in human beings is 1.5 the available nitrogen in the at-rest ecology.

Questions:
Firstly, is this a valid assertion?
Are Earth resources truly finite as assumed?
Are the available resources measurable? If so - who has a good set of data we can use for modelling?

Secondly, if resources are finite and measured - and we are consuming capital exponentially - what are our options?
What lattitude do we have for increasing carrying capacity?
How far can carrying capacity be pushed?
Can we survive in a no-growth, or contracting economic model?
What are the options for population modification?
How long do we have?

These questions are not formulated to "troll" world views. I am asking questions that a lot of people should have rational answers for.
Please reply in the spirit of the questions. Data would be good, as well as well considered models that can be tested.
Also welcome are weblinks that have rational foundations - no ratbag theory please.

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Closing Statement from Mitch SMith

OK.

I have digested available metrics and known models.

Like everyone else, I am finding that the non-linear factors render the numbers functionally useless. The modeling methods themselves seem to yield more information - but all models admit to not representing any comprehensive claim.

However, one thing is clear - the window of opportunity for business-as-usual closed sometime mid 1900's, the balance of carrying capacity against draw-down of fossil energy is well under way - capital is definitely being exponentially consumed and has a terminal point at around 2050 - at which point all life on planet earth will cease.

But this assumes business as usual based on what we think we know - as it turns out, we know very little.

So .. in this scenario - ignorance is bliss.

I the analogy of our common understanding, we are screwing the planet and the value it represents. So .. to stay within the things we understand - are we rape/murdering the panet - Or are we mating with it?
This distincion is the critical facto determining if a single human will occupy the universe past 2050.

2050 is a conservative estimate - I would recommend you start answering it now.
It might be too late for you, but you might have children.
If you value hope ..
Remember - hope is not required in the universe outside of your own skull.
What you do is important - to you.
I couldn't care less. _ I've made my choice.

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  • Nov 26 2012: are earth resources finite sa assumed?yes,of course.
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      Nov 26 2012: Hi Flexman.

      I wish it was that simple.
      However, if it can be shown that our resources can regenerate faster than we use them, then they are effectively infinite.
      We will need some numbers to estimate the truth about this.

      I am currently compiling data from sources offered here and will publish the estimate after the conversation closes.

      If you have some numbers to add - please do so.
      • Nov 27 2012: I hope i can help ,but i don't have the data.

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