alternative
beautiful
blade
blue
carbon
cloud
conservation
development
electric
electrical
electricity
energy
environment
environmental
evening
farm
friendly
generate
generation
generator
global
green
industrial
industry
landscape
mill
natural
nature
power
propeller
renewable
resource
rotate
rotation
sky
spin
sun
sunrise
sunset
sustainable
technology
turbine
warming
watts
white
wind
windmill
windpower
windturbine