to prechain emissions and N2O from pasture and
cropland, and relatively insensitive to combustion
and manure sources (Fig. 1a). Therefore, the carbon
footprint of beef cattle production in this region was
not highly sensitive to any one component. If steps
are taken to reduce the carbon footprint of cattle, the
greatest impact can be made by focusing on reducing
enteric CH4 production. Reducing this source is very
difficult, though, without interfering with animal productivity
and perhaps raising public health concerns
for chemical residues in meat (Johnson and Johnson,
to prechain emissions and N2O from pasture andcropland, and relatively insensitive to combustionand manure sources (Fig. 1a). Therefore, the carbonfootprint of beef cattle production in this region wasnot highly sensitive to any one component. If stepsare taken to reduce the carbon footprint of cattle, thegreatest impact can be made by focusing on reducingenteric CH4 production. Reducing this source is verydifficult, though, without interfering with animal productivityand perhaps raising public health concernsfor chemical residues in meat (Johnson and Johnson,
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