What is black snowblack snow?

What is black snowblack snow?

Black snowblack snow, commonly referring to "black snow," is a phenomenon where snow appears dark or black due to pollution and environmental contaminants. It occurs when atmospheric pollutants, such as soot, ash, dust, or industrial emissions, mix with falling snow. This results in snow that is discolored and often harmful to ecosystems and human health.

- Causes: Primarily industrial pollution, coal burning, vehicle emissions, and natural events like wildfires.
- Composition: Contains heavy metals, particulate matter (PM2.5/PM10), and carbon particles.
- Appearance: Unlike white snow, it has a gray to black tint, making it easily identifiable.