A low-cost, high-volume livestock-rearing method pioneered in North Carolina came under fire Tuesday as jurors began hearing a lawsuit from neighbors who say the world's largest pork corporation is endangering their health and making their lives miserable. The legal action is the first in a string of federal lawsuits against the hog-production division of Virginia-based Smithfield Foods. Its outcome could alter production methods and profits for the company, which controls everything from the feed the animals eat to when they are trucked to slaughter and how the meat lands on consumers' plates. Smithfield was bought in 2013 by a division of China-based WH Group, the world's largest pork producer.