The environment effects from the breakdown of bedded hoop barns and confinement buildings.
| Requirement | Bedded hoop barn | Confinement |
|---|---|---|
| Building space | At least 12 square feet per hog | 8 square feet per hog |
| Feed intake | 6.18 pounds of food per day | 5.9 pounds of food per day |
| Bedding | Bedding 200 pounds of corn stalk bedding per pig in lifetime | No bedding used |
| Managing manure | Mixes with bedding in a solid form, composted and used as crop fertilizer | Collected in liquid form in manure pits, can be spread on crops as fertilizer |
| Regulation of environment | Natural ventilation, no heating system | Heating and cooling incorporated |
| Additional land | Pasture may be used, crop rotation necessary to remedy land destruction | No |