The ground source heat pump mainly utilizes the shallow geothermal energy tor heating or coonng, which is a technology with the advantages of saving energy and protecting environment.

地源热泵技术主要利用浅层地热能为建筑物供暖和制冷，有着节能减排、高效环保等优点。

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For solving defects when solar energy and geothermal-source heat pump are used alone, method of the solar energy - geothermal source hybrid heat pump system is proposed.

为了解决太阳能和土壤源热泵单独应用时存在的缺陷，提出太阳能-土壤源混合式热泵系统的设计方案。

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On energy and so on coal, petroleum, natural gas, geothermal energy, nuclear power, not only the reserves, the development quantity are limited, moreover is the renewable energy source.

就煤、石油、天然气、地热能、核能等能源来说，不仅储量、开发量有限，而且是不可再生能源。

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Tomorrow (or, at least in the not-too-distant future), the small Central American nation intends to tap the chain of volcanoes it sits above as a source of geothermal energy.

FORBES: Scaling Geothermal in Central America

Nukes may not be quite as clean as wind, solar or geothermal, but they provide a carbon-free and domestic source of energy that produces lots of jobs.

FORBES: On Eve Of Nuclear Renaissance, Florida Nuke Project Gets Postponed