environmental
actual
alternative
blade
clean
close up
closeup
cloud
copyspace
cutout
detail
development
ecological
ecology
efficiency
electric
electrical
electricity
energy
equipment
farm
generation
generator
industrial
innovation
innovative
mill
modern
plant
power
production
propeller
renewable
renewable resource
rotate
single
station
sustainability
system
technology
turbine
wind
wind energy
windfarm
windmill