Heh.
That's just it. North American birthrate is so low, that the baby boomers are going to be a bit of a burden. I suspect some of them might have to sweep up at McD's....BFD.
http://www.fromthewilderness.com/free/ww3/100303_eating_oil.htmlIn a very real sense, we are literally eating fossil fuels. However, due to the laws of thermodynamics, there is not a direct correspondence between energy inflow and outflow in agriculture. Along the way, there is a marked energy loss. Between 1945 and 1994, energy input to agriculture increased 4-fold while crop yields only increased 3-fold.11 Since then, energy input has continued to increase without a corresponding increase in crop yield. We have reached the point of marginal returns. Yet, due to soil degradation, increased demands of pest management and increasing energy costs for irrigation (all of which is examined below), modern agriculture must continue increasing its energy expenditures simply to maintain current crop yields. The Green Revolution is becoming bankrupt.....
......Modern intensive agriculture is unsustainable. Technologically-enhanced agriculture has augmented soil erosion, polluted and overdrawn groundwater and surface water, and even (largely due to increased pesticide use) caused serious public health and environmental problems. Soil erosion, overtaxed cropland and water resource overdraft in turn lead to even greater use of fossil fuels and hydrocarbon products. More hydrocarbon-based fertilizers must be applied, along with more pesticides; irrigation water requires more energy to pump; and fossil fuels are used to process polluted water.
It takes 500 years to replace 1 inch of topsoil.21 In a natural environment, topsoil is built up by decaying plant matter and weathering rock, and it is protected from erosion by growing plants. In soil made susceptible by agriculture, erosion is reducing productivity up to 65% each year.22 Former prairie lands, which constitute the bread basket of the United States, have lost one half of their topsoil after farming for about 100 years. This soil is eroding 30 times faster than the natural formation rate.23 Food crops are much hungrier than the natural grasses that once covered the Great Plains. As a result, the remaining topsoil is increasingly depleted of nutrients. Soil erosion and mineral depletion removes about $20 billion worth of plant nutrients from U.S. agricultural soils every year.24 Much of the soil in the Great Plains is little more than a sponge into which we must pour hydrocarbon-based fertilizers in order to produce crops.
Every year in the U.S., more than 2 million acres of cropland are lost to erosion, salinization and water logging. On top of this, urbanization, road building, and industry claim another 1 million acres annually from farmland.24 Approximately three-quarters of the land area in the United States is devoted to agriculture and commercial forestry.25 The expanding human population is putting increasing pressure on land availability. Incidentally, only a small portion of U.S. land area remains available for the solar energy technologies necessary to support a solar energy-based economy. The land area for harvesting biomass is likewise limited. For this reason, the development of solar energy or biomass must be at the expense of agriculture.
That's total speculation, but I've seen projections that the population would begin to drop somewhere towards the end of the century.
~String
nobody can actually make a correct guess about this date, since the rapid acceleration in technological achievements would turn impossible into possible;
India and China alone are one third of the Earths population.
Have faith in the Lord, you heretic!China is doing something about it : allowing their citizens to have only one child per couple . Most of India is poor and struggling . I think birth control is the answer everywhere although the moron the Pope does not believe on birth controls . If you follow the Vatican word by word this planet will be full of babies everywhere with no piece of bread left for anyone..
Orleander said:
If people quit helping third world countries will the overpopulation problem cease?
Yes, rising a kid to age where he /she is productive is expensive (and growing more so with higher education also more required by the modern world.) China has cleverly avoided excess cost with the one Child policy, and is importing ever more already well educated people from the West (who will pay taxes, advance Chinese technology and skills, etc.):China is doing something about it : allowing their citizens to have only one child per couple. ...
I have seen Europeans weep trying to drive the wide open spaces of North America. They simply cannot believe it.
We will not reach the point of severe overpopullation