During the last twenty years, industrial livestock farms have been replacing the traditional family size farms that once raised most of the nation’s swine. The number of livestock animals produced in the United States has grown modestly in the past two decades, but the number of farms raising them has shrunk dramatically because large producers now dominate the market. The large increase in industrial farming has led to large quantities of manure. The over abundance of manure has become a problem that leads to problems with pollution, hea ....