In the best farming operation, the cows produce manure, which is spread on fields to fertilize the grain to feed them (and other cows or humans) It keeps the soul immensely fertile, and that method of farming combined with rotating your crops, means you need buy no fertilizer for your grain.
The North American plains used to be black with millions of buffalo from Mexico into Canada. They shit on the grasslands they grazed which kept the grass fertile. A perfect cycle. And those millions of buffalo, many times more grazing animals than cattle exist in the America’s today, Never killed the climate.
But the vast herds containing millions of grazing cattle were gone by 1890. And with sleight of hand, the climate nazis convince people that far fewer milk cows and beef cattle will hurt the earth where the many times more numerous buffalo didn’t