aerodynamic
alternate
alternative
alternatively
amplitude
andalucia
andalusia
battery
climate
conservation
conserve
ecological
ecologically
ecology
electric
electrical
electricity
energy
environment
environmental
environmentalism
environmentally
force
generate
generation
generator
hillside
hilly
nonpolluting
originate
power
powerful
recycling plant
regenerative
regulation
renewable
resource
responsibility
rotor
solid
sustainable
tendency
turbine
windy