Question

Which of the following is source of light pollution?

• A. Electronic Advertising Boards and Commercial Centers
• B. Night Sports grounds
• C. Streetlights and car lights
• D. All of above

Answer 1

The correct option is D All of above

All are sources of light pollution.
Electronic Advertising Boards and Commercial Centers:
Many of the large electronic sign boards in the cities and on highways are lit up by powerful lights that focus on the boards from below. Lights end up reflected upwards off the boards.
Night Sports grounds:
Floodlights that light stadiums and other places of sports often contribute to light pollution as the powerful lights end up upwards.
Streetlights and car lights:
In some cities, hundreds of miles of powerful streetlights stay on all night. This, together with the vehicles that use the roads all contribute a lot to the light being directed above and to other unintended places