Project Green: Mega Cavern using natural heating to go green
WHAS Louisville KY
Jun. 01, 2009. 06:41 PM EST
Because they are underground, they are able to take advantage of the 58-degree average temperatur... More »
Because they are underground, they are able to take advantage of the 58-degree average temperature in the Louisville area. « Less
Clean & Renewable, Energy, Environmental Welfare, Geothermal, Government & Politics, Science & Technology
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