Harmonic radar suggests greater impact of light pollution for nocturnal insects

The presence of artificial light at night (ALAN) has dramatically increased in intensity and distribution over the past 150 y.Currently, it is estimated that more than 30% of terrestrial environments and 22% of global coastlines are affected by ALAN ( 1 , 2 ).The impact of ALAN is exacerbated because light from point sources such as street-and other forms of urban lighting can scatter tens of kilometers resulting in skyglow in areas of otherwise darkness ( 3 ).At its core, ALAN alters the physical properties of the nocturnal environment increasing its brightness and often shifting its color to a blue-wavelength-rich