機器
wind power
風力
alternative energy
blue
clean energy
clouds
color
color image
conservation of nature
consumption
ecology
electric utilities industry
electricity
energy saving
engine
environmental problems
generation of electricity
help
inducement
industry
knowledge
life
lohas
maintaining
manage
nature
outdoors
power
preservation
problem
renewable energy
resource saving
saving money
sky
slow life
social problems
stimulation
theme
turbine
vertical
weather
wind electricity
wind generator
windmill