Answer:
Desertification of formerly productive ecosystems.
Explanation:
Herman uses the phrase "landscape holocaust" to make reference to the devastation the ecosystems go through because of grazing. The word "holocaust" means massacre on a huge scale, which is why Herman uses it to portray how badly the terrain is affected when a large proportion of animals feed on them in a much unnatural way. Many companies acquire lands and disrupt ecosystems so that their livestock can feed on them.
