**Corn and soy require chemical applications that erode soils and contribute to water pollution.**
While I am not a fan of using chemicals on cropland, the fact that herbicides have greatly reduced tillage practices (thereby leaving crop residue on the surface to help prevent erosion), soil erosion is much less than, say, 30 years ago and before.
Hogs raised in confinement buildings may seem unethical to some folk, but if one goes to vintage aerial photo sites, and look at midwest farmsteads of the 1960s, one can see the dirt (or mud) hog lots were commonplace.
Yep
That and the new genetics for hogs have them so lean, they would die outside.
The hogs I raised growing up are what you see on TV now as “feral” hogs, not what you buy at the store. They loved being outside.