Livestock impacts on ecology

Páginas: 3 (573 palabras) Publicado: 15 de marzo de 2012
Livestock impacts on the environment
As a team we thought there was no big impact to the environment by livestock, but as it turns out it is one of the major problems worldwide in terms of globalwarming, land degradation and air and water pollution, almost in every pollutable way , this said by the FAO (United nations organization for agriculture and feeding), it also estimates that around of18% of green house gases emissions are done by livestock, representing even a larger number than transportation (cars, buses, plains, trains, ships etc.) impressive right?
The most recent dataabout the problem, given by livestock’s long shadow takes into account all the direct impacts and the effects of the extensive use of land caused by gazing and feed crops animal consume. It finds thatexpanding population and incomes worldwide, along with changing food preferences, are stimulating a rapid increase in demand for meat, milk and eggs, while globalization is boosting trade in both inputsand outputs.
Due to this inputs and outputs there has been a complex process of technical and geographical change. the major production is changing from the countryside to the urban and peri-urbanareas, and towards the sources of animal feed. Today, 80% of growth in the livestock sector comes from industrial production systems. Owing to those changes, the report says, ”livestock are enteringinto direct competition for scarce land, water and other natural resources.

Impact on land and greenhouse gases.
The livestock sector is by far the single largest anthropogenic user of land.Grazing occupies 26 percent of the Earth's terrestrial surface, while feed crop production requires about a third of all arable land. The expansion of grazing livestock is also one key factor in terms ofdeforestation, especially in Latin America where 70% of previously forested land in the Amazon is used as pasture, and feed crops cover a large part of the reminder, also excessive grazing have...
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