I mean, if you think about it, the cattle and the sheep ate the grasses which had been the conveyer belt for the historical fires, and this prevented once-frequent fires from thinning out trees and burning up dead wood.
Ou seja, as vacas e as ovelhas comiam as ervas que tinham sido o tapete rolante dos incêndios históricos. Isso impedia os incêndios, outrora frequentes, de eliminarem árvores e de queimarem a madeira morta.