Atmospheric Aerosols
Tiny particles or droplets suspended in the air—dust, salt, pollution, smoke—that scatter light and affect weather and climate.
Microscopic solid particles or liquid droplets suspended in the atmosphere, including dust, sea salt, sulfates, and pollution. They scatter and absorb sunlight, influence cloud formation, and affect air quality and climate. Natural sources include volcanoes and ocean spray; human activities release industrial and vehicle emissions.
What this means in real life
When you see haze over a city on a hot day, or notice dust particles floating in a sunbeam indoors, you're observing aerosols—the same particles that make sunsets red and reduce visibility during wildfires.
What it isn’t
Not the same as aerosol spray cans, which are pressurized containers that *release* aerosols. The term refers to the suspended particles themselves, not the delivery mechanism.
Commonly misused online
Often conflated with 'air pollution' as synonyms, though aerosols are a component of pollution but also occur naturally and can be beneficial (e.g., sea-salt aerosols seed clouds).