英文關鍵字
alternative
background
car
concept
conservation
development
eco
ecological
ecology
electric
electrical
electricity
energy
environment
environmental
factory
farm
field
generate
generation
generator
global
industrial
industry
innovation
landscape
mill
modern
natural
nature
plant
plants
power
propeller
renewable
resource
rotate
rotation
sky
station
sun
sunset
sustainability
sustainable
symbol
technology
trunk
turbine
wind
windmill