energy efficiency and sustainable power resource usage outline collection |
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| navigate by keyword : energy efficiency collection power consumption ecology green cost save performance electricity house home illustration concept technology vector sustainable class eco conservation appliance bulb solar rating economy alternative reduce light set environmental friendly residential renewable household clean management low utility supply smart property effective usage classification outline elements items labeled |
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| Energy efficiency and sustainable power usage in outline collection. Labeled elements with green and alternative electricity for smart home vector illustration. Effective solutions to save cost. |
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