Without a view of the stars at night, Don McLean would never have been able to write Vincent and Vincent van Gogh would not have painted Starry Night. Viewing a sky full of stars is part of what makes us human. The light from stars has travelled thousands of miles to reach our eyes.
But now, most Europeans live under unnaturally bright night skies. That ancient starlight is now diluted by human-made light pollution.
So where is all this extra light coming from? A recent German study reveals that, contrary to common assumption, public street lighting may not be the biggest cause of light pollution. The sources are closer to home. Improved energy efficiencies in LED technology means that artificial light is now cheaper than ever to run. As a result, people are lighting up front doors, sheds and garden paths like never before.
