bulb with graph and calculator euro banknotes |
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| navigate by keyword : alternative banking banknote bill bulb calculation calculator cash closeup concept conceptual conservation cost currency data ecofriendly economic economical economy efficiency efficient electric electricity energy environmental euro european finance financial fluorescent fuel graph graphical horizontal idea innovation investment kilowatt light lightbulb money nobody note number paper pen saving statistical statistics technology |
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| Closeup of energy saving bulb with graph and calculator on euro banknotes |
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