The hunt for the odourless pig

摘要

In two long buildings in Carroll A county, Indiana, some 8,000 pigs are doing what they do best: eating, defecating and squealing. Cute, they are. Tasty, they will be. But livestock operations like this one are increasingly under scrutiny. Above the pigs' heads are instruments measuring dust and noxious fumes. Farther east, in Randolph county, the local planning commission will vote next month on whether to limit the expansion of pig farms. As America's pig, cattle and poultry farms have become bigger and more efficient, so have fears of the effect on their surroundings.