sentences:  Iceland is the first country in the world to create an economy generated through industries fueled by renewable energy, and there is still a large amount of untapped hydroelectric energy in Iceland.In 2002 it was estimated that Iceland only generated 17% of the total harnessable hydroelectric energy in the country.Iceland's government believes another 30 TWh of hydropower could be produced each year, while taking into account the sources that must remain untapped for environmental reasons.