blue
cable
countryside
danger
distribution
electric
electrical
electricity
energetic
energy
engineering
environment
field
garmany
green
grey
grid
guidance
high
industrial
industry
landmark
landscape
line
meadow
metal
nature
paths
plant
pole
power
rural
sky
station
steel
structure
supply
technology
tower
trail
trails
transformer
transmission
trees
volt
voltage
watt
wire