Outdoor Lighting: Light Pollution
Then we read the article. And discovered that it really isn’t lovely. It’s light pollution. This image from NASA shows the earth at night. And what it means, according to night sky activist Anthony Arrigo, is that we’re so wasteful that sky glow (light escaping into the night sky and causing a glow over urban/suburban areas) costs the US between $5-10 billion per year. You read that correctly — and it doesn’t include all outdoor lighting, just the outdoor lighting that’s so misdirected that it lights up the night sky.