Light pollution

Work cat.: Sneddon, S. An investigation into light pollution in Europe and North America, 1999: p. 2 (artificial light which causes a detrimental effect on the environment, astronomical research, enjoyment of the night sky or causes undesirable glare or unnecessary illumination of adjacent properties)
Ox. Eng. ref. dict.: Light. adj. (Light pollution. excessive illumination of the night sky by street lights, etc.)
12,000 words (Light pollution. artificial skylight (as from city lights) that interferes with astronomical observations)