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No Thumbnail AvailableBook (stand-alone)Livestock & the environment: Finding a balance 1996
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No results found.One of the great challenges facing the world over the next decades is to preserve its natural resources while at the same time producing sufficient food to satisfy the demands of a growing human population. World population is expected to grow from 5.5 billion now to about 8 billion in the year 2020. Incomes also continue to grow, especially in the developing world and future projections estimate an annual per capita income growth ranging from about 3 percent in sub-Saharan Africa and Latin Amer ica to about 6 percent in Asia. Furthermore, there is a strong population move from the rural to the urban areas, again primarily in the developing world. By the year 2000, approximately 44 percent of the world's population is expected to reside in urban areas, up from 30 percent in 1980 (IFPRI, 1995). These trends will have immense consequences on the volume and composition of global food demand, especially in the developing world. Specialists of the International Food Policy Research Institute (IFPRI) estimate that the current demand of 1.7 billion tons of cereals and 206 million tons of meat, may rise by the year 2020 to 2.5 to 2.8 billion tons of cereals and at least 275 to 310 million tons of meat. -
No Thumbnail AvailableBook (stand-alone)Balancing livestock and environment; the grazing system 1998
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No results found.While the contribution of grazing systems to the world's meat supply is limited (nine percent of the global beef and thirty percent of the global mutton production), grazing systems have the most direct interface between livestock and land, water and bio-diversity, and cover the majority of the usable surface of the earth. They thus merit considerable attention in the livestock-environment debate. This presentation will first highlight the vast differences between the different grazing systems i n the various ecological zones, and then define, for each of these production systems, the main pressures it is subjected to, the main evolution of the world's grazing resources, and the key responses needed to arrive at their more sustainable use. As such, this presentation closely follows the Pressure State Response model, outlined in an earlier presentation. -
No Thumbnail AvailableBook (stand-alone)Balancing livestock and environment; the study framework 1998
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No results found.The interactions between livestock production and the environment are complex. Understanding the physical mechanisms, with which livestock improve or degrade the global natural resource base of land, air, water and bio-diversity is clearly important; however, human actions and activities, which make livestock behave the way they do, are much more important. In this Conference on Livestock and the Environment, it would therefore be incomplete to look only at physical interactions, such as the eff ect of stocking rate on the vegetation, or quality of feed on methane emission and global warming. A broader framework is required, which links human behavior and biological phenomena, such as grazing behavior and waste emission, into comprehensive models. This presentation seeks to sketch that broader framework. It will first describe the two conceptual models used in the Livestock-Environment Study, then use these models to describe general principles regarding livestock-environment inter actions, within and beyond production systems, and how future demand will affect the dynamics of those interactions. To provide the overall context, the paper will then link the objectives and scope of the Study with the same two conceptual models. The following papers in this Conference will focus on particular production systems, or describe cases within production systems with particular interesting policy-technology interactions.
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