environmental
air
alternate
alternative
blades
blow
breeze
carbon
clean
conservational
ecological
ecologically
efficiency
electric
electricity
energy
engineering
environment
environmentally
farm
field
friendly
generation
generator
green
hill
industry
innovation
line
mill
plant
power
propeller
recyclable
recycle
reduction
renewable
responsible
sky
source
technology
turbine
weather
wind
windfarm
windmill
windpower
windturbines