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Large cities are a more efficient (smaller ecological footprint) settlement structure -- provided that
A further consequence of (b) would be a reduction in organisation efficiency and stability. Further consequences of (a) (and (c)) would be an effort by those with power to secure the scarce resources for themselves. This on one hand could mean government rationing while the military is kept well supplied. On the other hand: robbery. Robbery, both for fuel and food, and suppliers evaluating the risk of robbery, would further limit food transport from afar into cities.
In short, I think citydwellers would be compelled to move closer to the sources of food. Even if the new, more rural settlement structure is able to feed less, even if bands of robbers roam the countryside. (They'd roam the cities, too.)
I think prior collapses of civilisations, most notably that of the (Western) Roman Empire and the Classic Maya (Tikal vs. Calacmul) give an example. But there is also a more recent occurence that I think is comparable. Look at this photo:
This is a Hamsterzug (="hamster train"), leaving Hamburg main station in 1946. Whence the name?
At the end of WWII, in Europe's bombed-out cities, urban food scarcity became a reality. What remained of transport infrastructure capacity was mostly used by the military. The nodes of the processing/distribution network were damaged, too, including slaughterhouses, mills, and shops themselves. There was widespread robbery, too.
So the lucky could temporarily move in with rural relatives (as some of my ancestors did). The less lucky travelled to the countryside and tried to 'buy' food from the peasants by giving them their valuables. But if nothing remained for sale, one thing remained: going into the woods to hunt for -- hamsters. *Lunatic*, n. One whose delusions are out of fashion.
b) You're confusing short-term dislocations with sustainability.
b) Why do you think that the future scenario I described is short-term dislocation? What happened in post-war Europe was short-term dislocation, because its causes were temporary (and local on a global scale), the causes of scarcity could be addressed. I don't think that applies to this future. *Lunatic*, n. One whose delusions are out of fashion.
Catastrophic crops will kill hundreds of millions in the next few years, but western countries will not come up with a grain-equivalent of the IEA strategic reserves until there is a bad price-rationing in a developed nation. I expect this could occur soon at the US agribusiness level of the supply chain, if we get the same crops for a few more years, keep on the biofuel craze, and the eastern block cuts its exports to keep a lid on domestic prices. Given the job and money weight of US agribusiness, hopefully they will shout out loud enough. Pierre
western countries will not come up with a grain-equivalent of the IEA strategic reserv
Monbiot.com: Goodbye, Kind World
We now know, for example, that the Himalayan glaciers which feed the Ganges, the Bramaputra, the Mekong, the Yangtze and the other great Asian rivers are likely to disappear within 40 years. If these rivers dry up during the irrigation season, then the rice production which currently feeds over one third of humanity collapses, and the world goes into net food deficit.
[Edited from China Daily
By August 1, 110 million hectares of arable land had been hit by drought, nearly 2 million hectares more than in previous years, according to the latest statistics from the Office of the State Flood Control and Draught Relief Headquarters. Jiangxi, Heilongjiang, Hunan, and Jilin provinces, and the autonomous regions of the Inner Mongolia and Guangxi Zhuang are the worst hit. About one-third of arable land in the provinces of Jiangxi, Heilongjiang and Hunan have been affected. The drought "poses a grave threat" to the autumn harvest Sun said during an inspection tour in Jiangxi yesterday. Jiangxi is experiencing a drought that is estimated to occur only once in 50 years, with 866,000 hectares of crops affected. Sun said the drought-stricken regions were the key grain production bases in China.
Jiangxi, Heilongjiang, Hunan, and Jilin provinces, and the autonomous regions of the Inner Mongolia and Guangxi Zhuang are the worst hit.
About one-third of arable land in the provinces of Jiangxi, Heilongjiang and Hunan have been affected.
The drought "poses a grave threat" to the autumn harvest Sun said during an inspection tour in Jiangxi yesterday.
Jiangxi is experiencing a drought that is estimated to occur only once in 50 years, with 866,000 hectares of crops affected.
Sun said the drought-stricken regions were the key grain production bases in China.
Was thinking in the same timeframe.
long enough for mechanisms like rationing and biofuels to eke out supplies along with crash programmes to move away from petro-chemical based argiculture.
That again sounds more like could than would (with the exception of biofuels, for which afew et al calculated a very low potential). If the process takes five to ten years, I'd 'count' on leaders to abandon any idea of a crash programme at the first sign of a recession, and keep to it for too long. *Lunatic*, n. One whose delusions are out of fashion.
Roman cities were, of course, plumped up by the material inflows of Empire ... the receding of the Empire to the Eastern Med would naturally result in a reduced size.
Oddly enough, though, since the US imperial system was constructed in the aftermath of WWII, where the concern was not in gaining new wealth but in ensuring demand for existing productive capacity, including capacity to produce new plant and equipment, we would be enriched by the direct effect of losing the base network underpinning our imperial system. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
Think of the very heart of the Empire, too. A city falling from one million inhabitants to 20,000. *Lunatic*, n. One whose delusions are out of fashion.
Iberia was rather being lived off of, that's why I put Trans-Alpine Gaul halfway between the Britons and Iberia rather than halfway between the Britons and Italy ... as a matter of social as well as physical geography.
But I certainly aint no ancient historian. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
Tarraconesis (Hispania)
By the end of the third century after Christ, the emperor Diocletian made the final reorganization of Spain under Roman rule. He divided the province of Tarraconensis into three additional provinces: Cartaginensis, Gallaetia, and Tarraconensis. During this period trade began to decline. The gold and silver had been drained from the eastern coast, and the government responded by attempting to regulate wages and prices. Individuals were deprived of the freedom of movement and the right to change their occupations.
...but couldn't find any figures for Hispanian city populations after the fall of the Roman Empire (looked specifically for Tarragona/Tarraco and Barcelona/Barcino) *Lunatic*, n. One whose delusions are out of fashion.
It's the same with the industrial-agriculture-is-doomed meme. Pesticides are a tiny volume of petrochemistry. They could be made with other inputs of CHON. Diesel for industrial machinery is again a tiny amount of total consumption. could already be replaced by diester without going mad about biofuel acreage (waste products are enough). The only true problem is natural gas used to make fertilizers (and not petroleum). It's several percent of all NatGas use, and if Peak Gas is a total cliff as expected, then it could bite into those few percents. But since what is needed is actually hydrogen, not natgas, we could still find substitutes, we have decades (like electrolysis from renewables of pyrocracking using solar heat).
Granted, phosphorus is a harder problem, but it is a bit less urgent than peak oil and gas. And I expect when peak oil hits the mainstream (that is, 20 years after it has happened and there is no concealing it anymore), it will change a lot in the way governments are held accountable to the management of these resources. So we are not entirely doomed as a specie. The biggest impacts will be socio-economic, and dense fuel-efficient cities are actually a way to mitigate this. Pierre
Of course, for drying after the harvest its more likely to be natural gas.
About the only time our current agricultural system doesn't use oil is when the farmer is in the house in the evening, consuming coal or natural gas fired electricity.
Indeed, for all of the hoo hah about ethanol driving up corn prices, I saw a claim floating around cyberspace that the major factor driving up corn prices were oil price spikes. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
1. A method for producing a combined phosphate fertilizer and soil conditioner without employing a mineral acid, which consists essentially of the steps of: (a) grinding a moist, acidic, organic waste material having a pH less than 5, a water content of at least 40% and lower calcium and phosphorous contents than the calcium and phosphorous contents of phosphate rock; (b) heating the acidic, organic waste material ground during step (a) to a temperature of 40° to 120° C. and at a pressure of 16 to 22 bar; (c) grinding phosphate rock to a particle size of 0.02 to 1 mm; (d) heating the phosphate rock ground during step (c) to a temperature of 50 to 800° C.; (e) combining the ground, acidic, organic waste material obtained during step (b) as the sole acidic reactant with the ground phosphate rock obtained during step (d) at a pressure of 20 to 55 bar to permit the ground, acidic, organic waste material and the ground phosphate rock to collide, to cause disintegration of the phosphate rock; and (f) cooling the mixture obtained during step (e) to 20° to 40° C. to obtain the desired product which contains almost all nutrient elements of phosphate rock. A method for producing combined phophorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is bark waste. A method for producing combined phophorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is peat or peat mud. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is waste fibre from a cellulose production plant. A method for producing combined phosohorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is sawdust. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the organic reactant is the solid component of communal sewage. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by the pH of the reagent mass. A method for producing combined phosphorous fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by calcium and phosphorus content of the reagent mass. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1 which the amount of water-soluble phosphorus in the fertilizer is regulated by the reaction temperature. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by the duration of the reaction. A method for producing combined phosphorus fertilizer and soil conditioner according to claim 1, in which the amount of water-soluble phosphorus in the fertilizer is regulated by the weight ratio of the fresh organic mass and the dry phosphate rock.
(a) grinding a moist, acidic, organic waste material having a pH less than 5, a water content of at least 40% and lower calcium and phosphorous contents than the calcium and phosphorous contents of phosphate rock;
(b) heating the acidic, organic waste material ground during step (a) to a temperature of 40° to 120° C. and at a pressure of 16 to 22 bar;
(c) grinding phosphate rock to a particle size of 0.02 to 1 mm;
(d) heating the phosphate rock ground during step (c) to a temperature of 50 to 800° C.;
(e) combining the ground, acidic, organic waste material obtained during step (b) as the sole acidic reactant with the ground phosphate rock obtained during step (d) at a pressure of 20 to 55 bar to permit the ground, acidic, organic waste material and the ground phosphate rock to collide, to cause disintegration of the phosphate rock; and
(f) cooling the mixture obtained during step (e) to 20° to 40° C. to obtain the desired product which contains almost all nutrient elements of phosphate rock.
I didn't specify a timeline, so I don't understand why both you and Colman thought of "quickly". I am thinking of decades for the whole process.
only a tiny fraction of all transport is foodstuff. And this would get priority
Why do you think so? I am not at all certain. It could get priority after government gets priority, which only means that pressures will be stronger elsewhere. (A hefty recession after the creduction of production capacity in major industries, but this time permanent unlike in the thirties, wouldn't be pretty.)
Pesticides are a tiny volume of petrochemistry... Diesel for industrial machinery is again a tiny amount of total consumption.
It's not the amount that matters most. You forget about costs rising strongly for farmers. Couple that with the lending market one could expect. *Lunatic*, n. One whose delusions are out of fashion.
hamster in etymologischem Woerterbuch
Zusammen mit einem original restaurierten preußischen Abteilwagen des Jahres 1927 werden regelmäßig sogenannte ,,Hamsterfahrten" nach Enniger zum inzwischen zu einer Kneipe umgebauten Bahnhof Pängel Anton unternommen. Der Begriff ,,Hamsterfahrt" bzw. ,,Hamsterzug" erinnert dabei an die ersten Nachkriegsjahre des Zweiten Weltkriegs, als die Städter regelmäßig mit dem Zug ins Umland fuhren, um sich mit Lebensmitteln einzudecken.
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