noun
primary energy
Technical term in energy policy and engineering for energy sources in their raw, unprocessed form (e.g., crude oil, coal, solar radiation).
一次エネルギーには石油や石炭などが含まれる。
Primary energy includes oil, coal, and the like.
日本は一次エネルギーの多くを輸入
Japan relies on imports for much of its primary energy.