The goal is to reduce dependence on imports and lower electricity costs.

其目标是减少对进口燃料的依赖，降低电力成本。

Shale gas, billowing out of the bedrock in ever-increasing quantities, is becoming the most important factor in the drive to lessen America's dependence on imported fuel.

从基岩开发出来的页岩气数量前所未有的增加，是使得美国能够减少对进口石油依赖最重要的原因。