air pollution
berlin
blue
building
business
car lights
cars
chimney
city highway
coal
cogeneration plant
darkness
electrical
electricity
energy
environment
equipment
evening
factory
generating
german
germany
global warming
headlights
highway
horizontal
industrial
industry
light traces
light trails
lights
long exposure
motion
night
place of work
plans
pollution
power
power plant
power station
rush hour
sky
smoke stack
technology
traces of light
traffic
transport
travel