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Addressing global health and climate impacts of household solid fuel use: lessons from the field and lab


Approximately 3 billion people in the global south rely on solid fuels burned in traditional stoves or open fires to provide most of their household energy. Taken together, these individual small fires have health, climate and environmental impacts on massive scales. For example, the resulting household air pollution is associated with several million premature deaths each year and contributes up to half of ambient particulate matter air pollution in some regions. Improvements to traditional cooking practices offer potential reductions in fuel use and pollutants¿ health and climate impacts. In some cases, financing via carbon credit sales has been used to subsidize roll out of stoves and fuels. In this talk, I will use a simple, extensible analytical framework to compare stove options across multiple impacts (health; climate) and quantify the potential co-benefits from upgraded fuel and stove combinations. Scoping analyses show that most current ¿improvements¿ are insufficient to provide the promised and needed health and climate benefits. In field evaluations of current or proposed stove interventions, my group has conducted in-home measurements of emissions and air quality in India, Malawi and Rwanda. Much of this work has shown how well-meaning interventions often fall short of their targets, and that laboratory-based evaluations often lead to great over-estimates of benefits associated with alternative technologies. A stove intervention in Rwanda combining a forced-draft gasifying stove with pelletized fuel shows promise far beyond that observed in earlier studies. Finally, I will discuss a complementary thread of laboratory research, in which my group is studying the evolution of emissions from biomass cookstoves during atmospheric photooxidation. These experiments show that more efficient stoves produce both less primary particulate matter emissions and also far less of the precursors that form secondary particulate matter during atmospheric aging. However, emissions from all stoves produce a substantial amount of secondary particulate matter, which is often not well represented in atmospheric models. Ongoing efforts are working to better understand and represent this aging process so that the full atmospheric lifecycle of emissions can be understood.

Föreläsare: Andrew Greishop, NC State, https://www.ccee.ncsu.edu/people/apgriesh/

Datum: 2020-02-20

Tid: 12:00 - 13:00

Kategorier: Naturvetenskap

Plats: Campus Johanneberg, Kemihuset, sal KC

Kontaktperson: Erik Thomson

Sidansvarig: |Sidan uppdaterades: 2012-01-02

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Utskriftsdatum: 2020-02-22