Ace the LEED Green Associate Exam 2025 – Go Green, Go Great!

Reducing light pollution is crucial for protecting ecosystems, human health, and the visibility of the night sky. One effective strategy is to eliminate unnecessary lighting. By reducing excess or poorly directed light, it helps minimize glare and skyglow, thereby preserving night environments. This approach encourages the use of only the lighting that is needed for safety and functionality, while also ensuring that light is directed appropriately to avoid spillage into areas where it is not needed.

The other options presented do not directly address the issue of light pollution. Smart irrigation systems, for example, are focused on water efficiency rather than light management. Increasing building height could potentially create more light spillage, and using dark-colored materials does not inherently mitigate light emissions but may influence heat absorption and reflection. Thus, the most effective way to tackle light pollution from the choices available is to eliminate unnecessary lighting.