Historically, leaving a light on (or candle or gas lamp burning) is a sign that someone is home and awaiting your arrival. It connotes the end of a journey and breathes familiarity, a safe harbor. In ...

When most people think about pollution they think about air, land, and water pollution. Types of pollution might include carbon monoxide, sulfur dioxide, nitrogen dioxide, ozone, hydrocarbons, thermal ...

Not long ago, one could gaze at the night sky and see the Milky Way. Light pollution, or artificial light at night, now significantly impedes our view of the Milky Way; air pollution contributes, too.

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Annemarie Conte Annemarie ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Megan Beauchamp Megan ...