blue
cable
chimney
clear
consume
current
ecology
economy
efficiency
efficient
electric
electricity
energy
engineering
facility
global
high
industrial
industry
line
mains
many
modern
network
pillar
plant
pollution
power
powerplant
produce
resource
saving
shock
sky
source
station
steel
structure
substation
supply
system
technical
technology
tension
transformer
vibe
voltage
warming
waste
wire