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Energy saving concept. Hand holding light bulb on green tree and...
Keywords:
electricity
efficiency
illuminated
fuel and power generation
recycling
power supply
human hand
sustainable resources
close-up
electric lamp
environmental conservation
industry
alternative energy
holding
nature
energy efficient
lighting equipment
equipment
environment
innovation
technology
power line
light bulb
energy saving
energy saving and electricity
human energy
resource saving
concept of energy saving
saving energy
light bulb tree
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