Such import restrictions and protectionism are a typical occurrence and are warranted, Dunn noted.

"Industry groups are quick to take up the fight and remind their governments of the biosecurity concerns of importing goods into their countries," he said. "The question is: Is this card played more often than the facts justify?"

A recent outbreak of foot-and-mouth disease resulted in the culling of more than a third of South Korea's domestic hog herd, tightening supplies in that country and forcing it to increase imports from many countries, including the United States, Canada, Chile and the European Union.

Dunn said the agreement could negatively affect pieces of South Korean agriculture, but not the entire industry. "They produce some goods that we don't produce at all, and some goods we produce are complementary to theirs," he explained. "In fact, South Korea exports products to the United States, mainly specialty and ethnic foods."

Dunn suggested that the South Koreans stand to gain in their automotive and electronics industries. The transport of automobiles and electronics to the United States and agricultural commodities back to South Korea will require many containers, ships and a lot of fuel.

"It's easy for an individual to vastly overestimate the transport costs, the fuel used and the inefficiencies inherent in transporting goods globally," he said. "Cargo ships are the most efficient form of transportation."

One cargo ship carries as much freight as a double-stack container train stretching from State College to Harrisburg, Dunn pointed out. "In fact, transport is most inefficient when the goods travel from the store to the home," he said.

The growth in free trade has contributed to the global increase in standard of living, according to Dunn. "The notion that money spent on distantly produced goods doesn't help the local economy is false," he said.

"Purchasing same-quality goods produced for a lower price from a distant source frees money for other local purchases. While there are always some losers, I believe the world is better off with free trade."