Open book with WIND TURBINES inscription, renewable energy concept
Schlüsselwörter
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