This may be the only example in the Island of geothermal heat.

Some believe that the water came from underground ice melted by geothermal heat.

Humans have taken advantage of geothermal heat this way since the Paleolithic era.

There are a wide variety of applications for cheap geothermal heat.

Global geothermal heat pump capacity is growing by 10% annually.

An outer ring of water would be used to cool the tunnel and protect it from the intense geothermal heat.

Heating was provided by electricity, solar power, gas and geothermal heat.

These pools of water, known as subglacial lakes can form due to geothermal heat and friction.

There was a lot of geothermal heat in the ground on Mount Fuzzy.

Examples of renewable energy sources include wind, moving water, the sun and geothermal heat from the ground.