alternative
blades
blue
clean
clear
ecological
ecology
electric
electricity
energy
engine
environment
environmental
equipment
field
generating
generation
generator
green
group
hillside
industry
natural
nature
outdoor
outdoors
power
propeller
renewable
rural
sky
spinning
station
structure
sun
supply
sustainability
sustainable
technology
turbine
turbines
wind
windfarm
windmill
windpower