But it is not clear that individual conservation will help as surging power demand has been driven by a huge expansion in energy intensive heavy industries, such as steel, construction, aluminium and chemicals.

• 但并不清楚个人的（）能否对激增的需求有所帮助，这些需求源自于那些能耗巨大的重工业的大扩容，例如钢铁、建筑、制铝业和化学工业。