FamilyWiggs
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biffvernon said:Those who despair with a cry of 'It can't be done' had best read up on Olduvai. http://dieoff.org/page125.htm
Well Biff - he's certainly spun out a very simple set of data to incredible lengths. Just 3 teeny weeny problems with his hypothesis:
a) He only uses oil, natural gas, nuclear and hydro electricity in his calculations. There are other energy sources, which will be come increasingly important. Include these and the graphs will look rather different - and less gloomy.
b) He takes no account of increasing energy efficiency; we can increasingly support greater levels of industrial civilisation on lower levels of per-capita energy use. From fire to steam to internal combustion to nuclear, industrialisation and per-capita energy use is not a linear relationship.
c) As Duncan himself admits, instead of the apocalyptic post-industrial phase he predicts, "other scenarios are possible" :roll: . One of those is one where technology comes to our rescue (as it always has to date) and we develop efficient renewable energy sources to continue our development. Duncan's thesis is basically Malthusian - energy resources are finite, therefore once consumed we're done for. Fortunately it doesn't take much imagination to work out that solar energy is (effectively) infinte and our future lies here.
I posted this a couple of weeks ago - this type of machine will be our "salvation". http://www.bbc.co.uk/news/science-environment-12051167. After all, plants have spent 4.6 billion years evolving their version of this machine - I doubt we'll come up with anything better. 19% efficieny on that machine would do us.
So, having solved the energy problem, we just need to confront the fact that food for 9 billion mouths is a mite tricky.... :wink: