It largely has to do with the fact that plants are being grown to feed you, rather than to feed animals that you eat. Every time energy changes forms you lose some, and a given biomass of plants can support a far smaller population of predators than of herbivores.
To a lesser extent, it has to do with which animals you eat. Large herbivores require more feed per pound than smaller ones, and ruminants also emit significant quantities of the greenhouse gas methane (belches, not farts) from their digestive processes.
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Answer:
It largely has to do with the fact that plants are being grown to feed you, rather than to feed animals that you eat. Every time energy changes forms you lose some, and a given biomass of plants can support a far smaller population of predators than of herbivores.
To a lesser extent, it has to do with which animals you eat. Large herbivores require more feed per pound than smaller ones, and ruminants also emit significant quantities of the greenhouse gas methane (belches, not farts) from their digestive processes.
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