Albedo is a measure of how much light is reflected by a surface. It is expressed as a percentage, with 0% being a perfectly black surface that absorbs all light and 100% being a perfectly white surface that reflects all light.
For example:
* Fresh snow has a high albedo, reflecting about 80-90% of sunlight.
* Dark soil has a low albedo, reflecting only about 5-10% of sunlight.
Albedo is an important factor in determining the Earth's climate, as it influences how much solar radiation is absorbed by the planet.
