In climatology black carbon or BC is a climate forcing agent formed through the incomplete combustion of fossil fuels, biofuel, and biomass, and is emitted in both anthropogenic and naturally occurring soot. It consists of pure carbon in several linked forms. Black carbon warms the Earth by absorbing heat in the atmosphere and by reducing albedo, the ability to reflect sunlight, when deposited on snow and ice. Black carbon stays in the atmosphere for only several days to weeks, whereas carbon dioxide (CO2) has an atmospheric lifetime of more than 100 years. The term black carbon is also used in soil sciences and geology, referring either to deposited atmospheric BC or to directly incorporated BC from vegetation fires. Especially for the tropics, BC in soils significantly contributes to fertility as it is able to absorb important plant nutrients.
Read more about Black Carbon: Overview, Emission Sources, Impacts, Mitigation, Policy Options
Famous quotes containing the word black:
“Mighty few young black women are doin’ domestic work. And I’m glad. That’s why I want my kids to go to school. This one lady told me, “All you people are gettin’ like that.” I said, “I’m glad.” There’s no more gettin’ on their knees.”
—Maggie Holmes, African American domestic worker. As quoted in Working, book 3, by Studs Terkel (1973)