## 3 Results and Discussion
### Potential Implications of Gasifier Cook Stove Uptake  
#### 3.3.1 Income Generation  
Adoption of gasifiers can result in income generation opportunities:  
Sales of gasifiersDuring follow-up visits and discussions with the respondents, they reported that other households that had not received a gasifier were asking where they could purchase one. The perceived demand among households at the study sites represents potential for more uptake  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Fuel** & \begin{tabular}{c} **Easy to** \\ **Prepare** \\ \end{tabular} & \begin{tabular}{c} **Charcoal** \\ **Production** \\ \end{tabular} & \begin{tabular}{c} **Easy to** \\ **Light** \\ \end{tabular} & \begin{tabular}{c} **Hot Flame** \\ **Period** \\ \end{tabular} & \
\begin{tabular}{c} **Burning** \\ **Period** \\ \end{tabular} &
\begin{tabular}{c} **Total Score** \\ \end{tabular} \\ \hline Neem (_Azadirachta indica_) & 4 & 20 & 5 & 15 & 18 & 62 \\ \hline Coconut (_Cocs nucleara_) shells & 12 & 4 & 20 & 20 & 3 & 59 \\ \hline Mango (_Mangifera indica_) & 8 & 8 & 4 & 5 & 15 & 40 \\ \hline Maize (_Zea mays_) cob & 18 & 3 & 10 & 1 & 4 & 36 \\ \hline Casuarina (_Casuarina equistifolia_) & 3 & 10 & 8 & 7 & 5 & 33 \\ \hline Cashew (_Anocardium cicidentale_) & 5 & 5 & 3 & 2 & 5 & 20 \\ \hline Total & 50 & 50 & 50 & 50 & 50 & 250 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Ranking by householders of the fuels used with the gasifier cook stove, based on different fuel qualities.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Fuel** & \multicolumn{3}{c}{**Availability**} & \multicolumn{3}{c}{**Frequency of Use**} \\ \cline{2-5}  & **Matuga** & **Ng’ombeni** & **Matuga** & **Ng’ombeni** \\ \hline Coconut shell & 5 & 3 & 3 & 3 \\ Casuarina & 4 & 4 & 5 & 15 \\ Mango firewood & 11 & 10 & 15 & 7 \\ Cashew nut & 20 & 7 & 18 & 4 \\ Neem & 7 & 24 & 7 & 19 \\ Maize cob & 3 & 2 & 2 & 2 \\ \hline Total & 50 & 50 & 50 & 50 \\ \hline \hline \end{tabular}
\end{table}
Table 3: Availability and frequency of use of fuels commonly used with the gasifier in different areas of Kwale County.  
of gasifiers, which could mean job creation in gasifier manufacture and sale by local community. However, at the local level, this would require capacity development with facilities and training.  
_b. Sales of charcoal:_ Some or all the charcoal produced from the gasifier could be sold to generate income. This could apply for the 58% of households surveyed that were not using charcoal prior to introduction of the gasifier.  
_c. Chopping firewood:_ Chopping wood to use with the gasifier either manually (or otherwise) could be a source of income especially for the youth, as this was a challenge for 42% of gasifier users [23]. Women used a machete and men a saw to cut the wood. Women using a gasifier in rural Kenya also reported preparing fuel to use with the gasifier as an extra task not experienced while using the three-stone open fire [20].  
_d. Sale of surplus firewood from trees on-farm:_ As reported in Section 3.3.1, the gasifier uses less fuel than the three-stone open fire. Fuel consumption was reduced by three headloads of firewood (105 kg) per month after the gasifier was introduced, and if it was sourced on-farm and household decided to sell the saved firewood at an average price of 50 KES per headload in the area, they could raise 150 KES (1.5 USD) per month.