environmental
alternative
blade
blades
blue
clean
clouds
conservation
development
ecological
ecology
efficiency
efficient
electric
electricity
energy
environment
farm
field
generate
generation
generator
global
green
industrial
industry
landscape
mill
natural
nature
power
propeller
renewable
resource
rotate
rotation
rural
sky
spin
supply
sustainability
sustainable
technology
tower
turbine
warming
water
wind
windfarm
windmill