Chemical energy, which is everything from wood to crude oil to gasoline to coal, consists of playing with the electrons, changing their energy state.
从木头、原油、汽油到煤炭,它们中释放出来的化学能量是通过改变其中电子的能量状态实现的。
3
The oil-equivalent metric represents all forms of energy consumed, including crude oil, nuclear power, coal, natural gas and renewables sources such as hydropower.