insert two dashes where needed. a fungus has been reducing the bean yield of coffee trees in central…

insert two dashes where needed. a fungus has been reducing the bean yield of coffee trees in central america, so the united states the worlds largest consumer of coffee has funded a research program to investigate the outbreak.
Answer
Brief Explanations:
Dashes are used to set off an appositive phrase. "the world's largest consumer of coffee" is an appositive that gives more information about "the United States".
Answer:
A fungus has been reducing the bean yield of coffee trees in Central America, so the United States -- the world's largest consumer of coffee -- has funded a research program to investigate the outbreak.