Hydraulic fracturing requires massive amounts of water. Disposing of the toxic wastewater, as well as accidental spills, can contaminate drinking water and harm human health.
The malaria parasite has been killing children and sapping the strength of whole populations for tens of thousands of years. It is impossible to calculate the harm malaria has done to the world.
I think Ginsberg has done more harm to the craft that I honor and live by than anybody else by reducing it to a kind of mean that enables the most dubious practitioners to claim they are poets because they think, If the kind of thing Ginsberg does is poetry, I can do that.
The real harm of term extension comes not from these famous works. The real harm is to the works that are not famous, not commercially exploited, and no longer available as a result.