alloy
alternative
clean
conservation
development
eco
ecology
efficiency
electric
electricity
energy
environment
environmental
equipment
generate
generation
generator
global
industrial
industry
innovation
iron
landscape
mast
metal
motor
ocean
power
propeller
protected
renewable
resource
river
rotate
rotation
sea
sky
stand
supply
sustainability
sustainable
technology
tower
turbine
warming
water
watt
wave
wind
windmill