background
blue
cable
chaos
city
communication
danger
dangerous
detail
disorganized
electric
electrical
electricity
energy
field
generator
green
grid
high
industrial
industry
line
low
metal
nature
network
old
outdoor
plant
pole
poles
post
power
pressure
safety
signal
sky
supply
tangled
technology
telegraph
telephone
traffic
uk
urban
voltage
warning
web
wire