alternative
basque
blade
blue
cloud
color
conservation
country
ecology
electric
electricity
energy
environment
environmental
farm
field
fuel
generate
generation
generator
green
industrial
industry
landscape
mill
nature
nobody
outdoors
plant
power
propeller
renewable
resource
rotate
rotation
rotor
row
scene
sky
sunset
supply
sustainability
sustainable
technology
turbine
watts
white
wind
windmill