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The main alternative energies being used in Polk county are Natural Gas and Solar Power, mostly on a residential level.

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Geothermal energy harnesses the power of the Earth's internal heat.

Geothermal power is clean, reliable and cost effective but its availability is often limited to areas near tectonic plate boundaries.

In some parts of Iceland, hot water runs from geothermal power plants under pavements and roads to help melt ice.

A home geothermal energy pump can cut energy bills by 30 to 40 percent and will pay for itself.

Geothermal energy can be used for a power source and for heating.