글의 주제로 가장 적절한 것은? Coffee, often known as "black gold," is the world's top-selling product after oil. It is grown in 60 countries and is worth around $80 billion per year. However, while affluent consumers pay several dollars for a cup of coffee and, in so doing, help international companies to make millions in profit, the coffee farmers themselves enjoy few benefits. An average coffee farmer receives less than 3 cents for a $3 cup of coffee. Because they are forced to sell their crops at the lowest possible price, the farmers remain trapped in poverty.