The unprecedented gains in life expectancy over the past 300 years, the reductions in disease prevalence, and the increasing age at onset of disability have all contributed to raise the number of years free of disease and disability that a person born today can expect to live. In addition, the development of cures for many conditions and the pro-vision of effective symptom management for those conditions that cannot be cured have eliminated or reduced...
Jumat, 23 Desember 2011
Sabtu, 17 Desember 2011
Conclusion and outlook
The sections above have documented how advances in agricultural efficiency after 1700 allowed the societies of Europe and North America to expand and improve their diets by an unprecedented degree. The rise in agricultural efficiency set off a self-reinforcing cycle of improvements in nutrition and gains in labor productivity, leading to a substantial increase in per capita output, which has come to be known as “modern economic growth”. It was shown...
Selasa, 13 Desember 2011
Food production
Vaclav Smil
Humans acquire relied during the beforehand of their change on a basal of aural bureau to dedicated their aliment supply. In abounding places in the tropics the oldest strategies (foraging and animate agriculture) had coexisted accessory by accessory with afterwards bureau of aliment pro-vision (pastoralism, board farming) for complete connected periods of time (Headland and Reid, 1989). In others, China achievement a complete example,...
Kamis, 01 Desember 2011
A brief history of food production & Foraging societies
A brief history of food production
Every new find of hominid remains in East Africa reignites the controversy about the origin of our species, but at least one conclusion remains unchanged: we have come from a long lineage of opportunistic foragers, and for millions of years both the natural diet and the foraging strategies of hominids resembled those of their primate ancestor (Whiten and Widdowson, 1992). Larger brains improved the odds of their...
Sabtu, 26 November 2011
Traditional agriculture's
In comparison to foraging, traditional farming nearly always required higher inputs of human energy (and later also of animal labor), but it could support higher population densities and provide a more reliable food supply. Whereas foraging (except for maritime hunting) could support no more than a few people per 100 hectares (ha) of territory used for gathering and hunting, early traditional agricultures managed to support at least one person/ha...
Sabtu, 19 November 2011
Modern farming
New energy sources and three intertwined strands of innovation explain most of the success of modern farming. In contrast to traditional agriculture's, nonrenewable fossil fuels and electricity are essential inputs in modern farming. They are needed to build and operate agriculture machinery whose nearly universal adoption mechanized virtually all field and crop-processing tasks. The second key innovation is the use of fossil energies and electricity...
Jumat, 11 November 2011
Current food production and supply & Global food production
Current food production and supplyA word of caution first: only a minority of food production and consumption figures readily accessible in FAO databases and widely used in assessments of global food availability and needs is derived from the best available national statistics which may themselves contain many inaccuracies even when prepared by the most advanced statistical services of developed countries. Although some of the developing countries...
Kamis, 03 November 2011
Food supply
The world’s recent edible crop harvests prorate to about 4700 kcal/day per capita, but nearly half of the cereal production, worth about 1700 kcal/day, is fed to animals, and postharvest crop losses amount to some 600 kcal/day (Smil, 2000). This leaves about 2400 kcal/day of plant food and with some 400 kcal/day from animal foods (including aquatic products) the average per capita availability adds up to roughly 2800 kcal/day, well above a generous...
Jumat, 28 Oktober 2011
Malnutrition in the developing world & Future food needs
Malnutrition in the developing world
Food deficits, regardless of whether they are on national, local or individual level, or if they range from marginal to crippling, are rarely caused by absolute physical short-ages. Such cases arise repeatedly only as a result of protracted civil wars (recently in Afghanistan, Angola, Ethiopia, Mozambique, Somalia, and Sudan) and temporarily as an aftermath of major natural catastrophes. Chronic undernutrition...
Jumat, 21 Oktober 2011
Population growth
After decades of accelerating growth the global rate of population increase peaked at just over 2% a year during the late 1960s, and gradual declines of fertilities also speeded up the arrival of the absolute peak, at about 86 million people a year, during the latter half of the 1980s and the annual increase was down to 77 million people by the year 2000 (UN, 1998, 2001). As a result population projections issued during the 1990s had repeatedly lowered...
Jumat, 14 Oktober 2011
Increased demand for animal foods
As described in the previous section, af uence changed this consumption pattern but intakes of animal foods are badly skewed in favor of high-income populations. Industrialized nations, amounting to only a fifth of the global population total, now produce a third of hen’s eggs, two-fifths of all meat, and three-fifths of all poultry and cow’s milk. Animal foods now supply around 30% of all food energy in North America and Europe, around 20% in those...
Jumat, 07 Oktober 2011
Dietary patterns
No other factor will determine the future demand for animal foods as much as the degree of westernization of diets in developing countries in general, and in populous Asian nations in particular. Informed discussion of this prospect must start by acknowledging the fact that, in spite of broad similarities, there are substantial differ-ences in meat and fat intakes among Western countries. This means that there is no generic Western diet to which...
