It doesn't though, in terms of efficiently feeding people, selective breeding does, which is basically humans apply selection pressure to efficiently feed themselves.
Let's take a non meat example so as not to tempt a random source dump...
Brassica oleracea (they have missed oilseed rape out too, as although similar in structure to the wild plant, the oil yield from the seeds is much higher)
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Agriculture differs from burning fossil fuels as fossil fuels are carbon that has been sequestered millions of years ago and removed from the atmosphere which you dig up and burn. Agriculture (cropping, grazing ruminants on grass) often actively sequesters it.
Funny, charts that show agricultural emissions never mention how much it sequesters...