There are no thermal or nuclear power plants in Iceland.
Today its fossil fuel use is mostly for transportation.
But it is also working on cars that run on renewable energy.
Iceland plans to use no fossil fuels at all by 2030.
Iceland has a population of about 300000 people.
Its area is about the size of Hokkaido and Shikoku together.
Japan has a larger population and area, so it is difficult to compare the two countries.
However, Japan also has many volcanoes and a lot of water.
Maybe Japan can learn some things about energy from Iceland.