英文關鍵字
animation
automobile
battery
bulb
business
cake
cartoon
diesel
eco
ecology
electric
electricity
energy
environment
environmental
factory
fuel
gas
gasoline
green
home
icon
illustration
industry
light
motion
nature
oil
paint
petrol
petroleum
plant
plug
power
protection
pump
recycling
renewable
ruf
save
shield
sign
solar
station
such
sun
sustainable
technology
turbine
urban
wind