風を受けて回転する風力発電用風車の翼
Keywords
wind,
wind power,
windmill,
wing,
spinning,
power generation,
blue skies,
cloud,
sky,
eco,
nature,
energy,
landscape,
environment,
electricity,
green,
fossil fuel,
flow,
ecology,
environmental issue,
global warming,
oil,
earth,
turbine,
generator