Article Date: 02/13/2009

UNEARTHING GEOTHERMAL ENERGY

by Stephanie Aurora Lewis, RA, LEED

Below the ground's frost line lies the most effective, natural, dependable and free solar collector -- the earth. Its slowly changing, cave-like ground temperatures can be harvested for heat needed to warm a building and conversely, to cool it in the summer. Formerly an underdeveloped ... Log in to view the full text.

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