206) World’s population growth over the last 10 000 years Written by Rainer: rainer.lehrer@yahoo.com Learn languages (via Skype): Rainer: + 36 20 549 52 97 or + 36 20 334 79 74

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World’s population growth over the last 10 000 years   World’s population growth supposedly depends on or is linked to different factors: 1) climate and its changes 2) kinds of domestic animals goat since 11 000 years chicken since 2 000 years pig since around since 8 500 years cow / taurine since 10 500 years 3) food supply / agricultural methods, plough / use of cow or horse as draft animal wooden plough since 4 000 years use of cow or horse as draft animal since 2 500 bronze plough since 1 500 iron plough since 1 000 4) conservation methods / pottery, ceramics / salt pottery since 29,000 – 25,000 salt around 800 BC 5) technical development smelting metals since 8 000 charcoal since 30 000 years coal since 3 500 BC ferrous / iron metallurgy since 4th millennium BC bronze since 3500 BC   population growth climate change all three together   Conclusion: It’s still not quite clear to what extent climate change is linked to human activity and vice versa. However, we know that the improvement of living conditions lead to growth of population in certain, especially poorer, regions.   -------------------------------------------   Of course, we shouldn’t destroy our environment. A city with many trees is much nicer than one only with concrete. Cancer incidence rates, adjusted for population age distribution, are different in rural and urban areas. Lung cancer rates are lower in rural areas with rates approximately 65% of those in urban areas, probably due to air pollution. On the other hand, breast and prostate cancer incidence rates are higher in village areas by approximately 8% and 11% respectively.   Depiction: 1) climate change during the last 12 000 years 2) forest in green during the last 12 000 years Apparently, we don’t seem to know much about what’s really going on around us.   Back to list!

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