Open book with BIOENERGY inscription, renewable energy concept
Schlüsselwörter
bioenergy,
textbook,
education,
document,
protection,
environmental,
climate,
future,
renewable,
eco,
expertise,
photocell,
change,
nature,
ecology,
green,
alternative,
technology,
environment,
open,
inspiration,
bright,
graphic,
reading,
save,
measurement,
electric power,
high,
metering,
budget,
efficiency,
cost,
efficient,
electric,
lower,
reduced,
consumption,
expensive,
voltage,
residential,
system,
book,
concept,
industry,
power,
electricity,
saving,
energy
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