PowerShares WilderHill Clean Energy ETF (PBW) Holdings [View article]
Hey Aquaculture - I believe you mean ground sourced heat pumps not geothermal. Speaking as a geologist, geothermal is hot water gysers etc. Ground sourced heat pumps use the stable temperature of the earth as a heat source (winter) or sink (summer) for a heat pump.
PowerShares WilderHill Clean Energy ETF (PBW) Holdings [View article]