alternative

below

blade

blue

bright

clean

copy

country

ecology

efficiency

electric

electricity

energy

environment

environmental

front

generate

generation

generator

glowing

green

industrial

industry

innovation

landscape

mast

nature

plant

power

renewable

resource

rotating

rotation

silhouette

sky

space

station

sustainability

sustainable

tech

technology

tower

turbine

turbines

turning

white

wind

windmill

wing

wings