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CEDAR RAPIDS, Iowa (AP) — Indian Creek Nature Center in eastern Iowa’s Cedar Rapids has announced that its Amazing Space facility has achieved Net Zero Energy certification.

The center — Iowa’s only nonprofit nature center — reached the goal using on-site solar panels, making it the first building in Linn County to achieve the status.

A “net zero energy” building means the total amount of energy it uses annually is equal to the amount of renewable energy created on the site.

Net Zero Energy is a certification administered by the International Living Future Institute based in Seattle.