Mid Sweden University

CO2  emissions with global warming-, landscape-, weather- and health effects open for transition from wood fuel toward solar energy in cooking performance. The study assessed a transition by a “sustainable diffusion scenario”. It measured climatic and environmental long-time impact helped by circular economy, cost assessment and socio-technical needs assessment guided by ethical consideration of an end user perspective. GWP from CO2, deforestation rate, economic- and technical- ease for a diffusion from a hypothetic scenario school in Nairobi, Kenya was assessed. CO2 modelling by LCA on Wood fuel and three solar cooking techniques along with rate of carbon loss from forest trees, was performed. Previous research and LCA results from the study was applied to test diffusion ability from needs assessment. The transition gave an emission CO2 decrease of minimum 80 tonnes and savings of up to 8,000 USD, yearly for the school. 58 trees were saved with a CO2 mitigative rate of minimum 80 tonnes yearly, and minimum 1 Ha of forest trees in 50 years. Needs assessment showed capacity for a long time sustainable solar cooking diffusion. End user cost for material in CO2 emission rate showed comparatively low USD cost for wood fuel material which pose an emission cost dilemma. Interdisciplinary and multidisciplinary quantitative and qualitative local level data collection toward end users already in a technical construction phase is needed. The 17 UN SDG could help visualising interlinking consequential patterns of impact regarding health, socio-economy, climate, and environment in a transition toward solar energy