was water powered/was powered by water?

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Simin93

Senior Member
Persian-Iran
Hi there

I think author should write “was powered by water” instead of “was water powered”, if not, could you please explain me why?


A century later the picture was completely different: by then, the world had an electric industry, and a quarter of its generating capacity was water powered.


Reference: Sample of TOEFL Exam

Thank you in advance
 
  • grassy

    Senior Member
    Polish
    They mean the same. 'Water powered' is an adjective and perhaps it should be hyphenated to make it clearer.
     
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