abstract
atom
battery
building
bulb
carbon
city
conservation
construction
eclectic
eco
ecology
efficiency
electric lines
electricity
energy
fuel
graphic
green
house
hydroelectric
icon
illustration
industrial
industry
manufacturing
nuclear power plant
panel
pictogram
plant
plug
power
power plant
pylon
refinery
renewable
saving
science
set
sign
solar
source
station
sun
supply
symbol
water
wind