Published on: December 20, 2022
Why in news? ISRO Geosphere Biosphere Programme reported that long-term measurements of black carbon over the Indian region from regional network of aerosol observatories clearly shows a decreasing trend in the past decade.
About Black Carbon
- It is a component of fine particulate matter and consists of pure carbon in several linked forms.
- Formation : Through the incomplete combustion of fossil fuels, biofuel, and biomass
- Occurring : Both anthropogenic and naturally occurring soot.
- Human morbidity and premature mortality
- It is a climate forcing agent contributing to global warming
- Life : stays in the atmosphere for only several days to weeks
- Presence in
- Soil: Significantly contributes to fertility as it is able to absorb important plant nutrients especially in tropic
- Water : Soluble and colloidal black carbon retained on the landscape from wildfires can make its way to groundwater.
- Black carbon Hotspot areas include:
- The Indo-Gangetic plains of India
- Eastern China
- Most of Southeast Asia and Indonesia
- Equatorial regions of Africa
- Mexico and Central America
- Most of Brazil and Peru in South America.
- Source: Approximately 20% from burning biofuels, 40% from fossil fuels, and 40% from open biomass burning
- Biodegradation :
- Condensed aromatic ring structures indicate black carbon degradation in soil.
- Saprophytic fungi are being researched for their potential role in the degradation of black carbon.