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OpenStudy (diana.xl):
If humans use energy-efficient devices in their homes, they would be practicing which of the following? efficient use of a fuel cell energy efficiency cogeneration energy conservation
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OpenStudy (diana.xl):
my answer is c
OpenStudy (funnyguy2):
they are reducing energy d. https://answers.yahoo.com/question/index?qid=20090517121734AAp0gM2
OpenStudy (diana.xl):
oh ok! thnx.
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