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Reduction of global livestock numbers and meat consumption has been recommended for climate change mitigation. However, the
basic assumptions made to come up with such kind of recommendations reveal severe methodological deficiencies: (1) Carbon
footprint, emission intensity, and life cycle assessments of domestic livestock products reported in scientific literature consistently
overlooked the necessity of correcting non-CO2 GHG (Green House Gas) emissions (nitrous oxide and methane) from managed
ecosystems for baseline scenarios over time and space (pristine ecosystem and/or pre-climate change emissions); (2) Uncertainties
associated with climate sensitivity of anthropogenic GHG-emissions have been ignored; (3) Inconsistencies in the methodological
treatment of land use change (deforestation) in emission intensity calculations (per unit of product) can be detected in literature;
(4) The lack of a discernable livestock signal in global methane distribution and historical methane emission rates has not been
acknowledged; (5) Potential substrate induced enhancement of methane breakdown rates have not been taken into consideration; (6)
Ruminants have been accused of low feed energy conversion due to energy loss through methane emissions by enteric fermentation.
It has, however, rarely been acknowledged that it is through ruminant livestock that fiber diets growing in abundance in vast areas
of grass and range-lands marginal to agriculture are converted into valuable food for humans (meat and milk). A tremendous
overestimation of potential livestock contribution to climate change is the logical consequence of these important methodological
deficiencies which have been inexorably propagated through recent scientific literature.
Biography
Albrecht Glatzle is an Agricultural Biologist with a PhD in Soil Microbiology from the University of Hohenheim, Stuttgart, Germany. During 25 years of applied research, he
worked in Botswana (FAO), Morocco (GTZ-INRA) and in Paraguay (GTZ-MAG), and later on as the Technical Director of the non-profit association INTTAS. From 1977
to 1981 and from 1985 to 1989, he was a Scientific Staff Member at the Institutes of Plant Nutrition and of Animal Production in the Tropics and Sub-tropics, respectively,
University of Hohenheim. He has authored more than 120 publications and/or reports and two books on pasture management.
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