Livestock raising contributes to climate change by the release of methane from cows, methane being a product of bacterial decomposition in their stomachs and a major greenhouse gas with a radiative forcing per molecule greater than that of carbon dioxide. It could be that this practice of livestock raising is equally dangerous to the climate system as the burning of fossil fuels.
food is also important biological resorses
La seguridad alimentaria dependen mucho del uso que se le dan a nuestros recursos naturales
El vínculo entre los recursos naturales y la alimentación es tan evidente que no requiere ser demostrado. Todos tenemos la experiencia de lo que comemos y que viene de la tierra. A partir de allí, las problemáticas alimentarias del comercio de los recursos naturales resultan igualmente evidentes.
las fuentes principales humanas son las tierras de cultivo, pesca y pastizales. las tierras de cultivo son la principal fuente de comida para el ser humano.
We have to be innovative in terms of space use whatever that we have for food production. Permaculture is one of the methods.
Is aquaculture the answer for the protein diet needed?
The practices in Developing Countries is really disturbing in my opinion.
Our food system is not sustainable.
For mainly economic reasons, the diets of most people in the world consist of staple grains. As people become more affluent, they tend to consume more meat, eggs, milk and cheese. The three major sources of food for humans are:
Croplands provide the bulk of human food. Even though there are thousands of edible plants in the world, only four staple crops (wheat, rice, corn and potatoes) account for most of the caloric intake of humans. Some animals raised for meat, milk and eggs (e.g. cattle, pigs, poultry) are also fed grain from croplands.
Rangelands provide another source of meat and milk from grazing animals (e.g. cattle, sheep, goats). Rangelands tend to be grasslands in semi-arid to arid regions that are not suited to growing crops without irrigation. The grasses provide food for grazing animals such as cattle and sheep.
These animals not only provide meat for food, but are also a valuable source of leather and wool. In regions with regular rainfall, livestock can be raised in set areas of open range. In more arid climates, nomadic herding of livestock may be necessary in order to find sufficient supplies of grass.
Overgrazing of rangeland by livestock can result in desertification of the area. In developed countries, livestock raised on rangeland are often fattened with grain in feedlots before slaughter.
Fisheries provide fish, which are a major source of animal protein in the world, especially in Asia and coastal areas. The ocean provides the biggest location of fisheries.
Commercial methods used to harvest these fisheries depend upon the types of fish (e.g. surface dwelling, bottom dwelling) being produced and their tendency to form schools.
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