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OpenStudy (olsolneo123):

1. Put these energy technologies in chronological order based on when they became important to industry.

OpenStudy (olsolneo123):

1 : Oil 2 : Water 3 : Steam 4 : Coal

OpenStudy (olsolneo123):

@robtobey

OpenStudy (anonymous):

2, 3, 4, 1 I think. If that is a possible answer, go for it.

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