TY  - SER
AU  - Eggertson, Bill
TI  - Earth energy: on ground-source heat pumps
KW  - EARTH ENERGY SYSTEMS
KW  - SOLAR ENERGY STORED
KW  - ENERGY REQUIREMENTS
KW  - EARTH ENERGY TECHNOLOGY
KW  - CONVENTIONAL HEATING-COOLING
KW  - GLOBAL WARMING
N1  - Earth energy systems use the solar energy stored within the ground, to provide heating and cooling for buildings. Worldwide, tens of thousands of systems are being installed each year, leading to considerable savings in Co2 emissions
ER  -