Iceland Runs on 100% Renewable Electricity

Iceland is the poster child for renewable energy. Every light switch flipped, every phone charged, every data center humming—100% powered by nature. No coal plants, no natural gas turbines, no nuclear reactors. Just water rushing down mountainsides and heat bubbling up from the Earth's core.

The breakdown is simple: about 70% hydropower and 30% geothermal. Iceland's landscape does the heavy lifting. Glacial rivers cascade through volcanic terrain, spinning turbines at massive hydroelectric plants. Meanwhile, sitting atop the Mid-Atlantic Ridge where tectonic plates collide, the island has access to virtually unlimited geothermal heat just beneath the surface.

Why Iceland Hit the Renewable Jackpot

Geography is destiny. Iceland straddles two tectonic plates that are actively pulling apart, creating intense volcanic activity. This gives the country easy access to geothermal reservoirs—underground pools of superheated water and steam that can be tapped for electricity generation and direct heating.

The hydropower story is equally fortunate. Iceland's climate produces heavy rainfall and snowmelt, feeding rivers that drop steeply from highlands to the coast. Combine that with sparse population (only about 380,000 people) and you have massive energy potential relative to demand.

Not Just Electricity

The renewable success extends beyond the power grid. About 90% of Icelandic homes are heated directly with geothermal water—no furnaces, no boilers, just hot water piped from underground straight into radiators. It's so cheap and abundant that Icelanders heat their sidewalks and driveways to melt snow.

But here's the catch: total primary energy is a different story. While electricity is 100% renewable, Iceland still imports fossil fuels for transportation and fishing fleets. Overall, about 85% of the country's total energy comes from domestic renewables. The remaining 15%? Imported oil for cars, trucks, and boats.

The Aluminum Connection

Iceland's cheap renewable electricity attracted an unlikely industry: aluminum smelting. Refining aluminum is incredibly energy-intensive, so companies like Rio Tinto and Alcoa built massive smelters in Iceland to take advantage of the low-cost, guilt-free power. About 70% of Iceland's electricity now goes to these energy-hungry industries.

Critics argue this creates a strange irony: Iceland exports its clean energy in the form of aluminum to countries that burn coal and gas. The aluminum itself is carbon-intensive to produce (mining bauxite, shipping it to Iceland, smelting it), even if the electricity used is green.

Lessons for the Rest of the World

Can other countries replicate Iceland's success? Not exactly. Iceland's combination of geothermal hotspots, abundant hydropower, tiny population, and geographic isolation is nearly unique. But the principle holds: renewable energy works when you match resources to location.

• Kenya and the Philippines are tapping their own volcanic geothermal potential
• Norway generates 95% of its electricity from hydropower
• Costa Rica regularly hits 100% renewable electricity for months at a time

Iceland proves that a modern, developed nation can run entirely on clean energy—at least for electricity. The challenge now is electrifying everything else: transportation, shipping, aviation. But if you can heat your driveway with a volcano, anything seems possible.