geoengineering explained: the benefits and challenges of biochar

Biochar, a form of carbon dioxide sequestration (SDR), is a solid material obtained from the carbonization of biomass. This produces a highly porous charcoal. The biomass is then buried in order to lock the carbon into the soil which can improve soil functions and the CO2 typically produced by the natural degradation of biomass is reduced. This practice is over 2,000 years old and biochar can be found throughout the world as a result of forest fires and historic soil management practices.



  • Slows actual climate change, rather than actively changing the climate itself
  • Slows the rate of ocean acidification
  • Enhances the soil and can be made from waste products, such as chicken manure
  • Sustainable biochar practices can produce oil and gas byproducts that can be used as fuel, providing clean, renewable energy
  • Measurable and verifiable carbon sequestration value
  • Competes with global fuel and food production
  • Will not prevent sea-level rises
  • Has questionable efficacy and is predicted to only have the ability to offset 10 percent of the warming caused by increases in CO2

see also:

Question: What is geoengineering?

Albedo Enhancement

Space Reflectors
Stratospheric Aerosols

Ambient Air Capture
Bioenergy Capture and Sequestration
Ocean Fertilization
Enhanced Weathering
Ocean Alkalinity Enhancement

Initiative, I. B. (2014). What is Biochar? Retrieved from
Ippolito, J. a. (2011, March 3-4). Biochar usage: pros and cons. Retrieved from
LePage, M. (2012, September 20). The pros and cons of geoengineering.