• 9 - A Biological Definition for Light Pollution by Dr. Abraham Halm

9 - A Biological Definition for Light Pollution by Dr. Abraham Halm

A Biological Definition for Light Pollution by Dr. Abraham Halm recorded at the 2011 International Light Association Conference “The Incredible Beingness of Light” at 

St. Sauveur, Quebec on 

October 3rd- 6th.