This is Mur 
@mur2501 @404zzz The thumbnail picture is just sad, no efficiency oven, means lot of wood lost. ideally the wood should be in a more closed box, with more isolation, to not use most fire to eat the air. Rocket stove is very efficient this way. Traditionnel Indian tandoori is also more efficient that this open fire. And in a (sub-?)tropical area like Sri-Lanka, low-tech (non electrical) solar oven should be very efficient too.
That's true, people are not educated about those more efficient ways. But slowly they are learning. I did not know about the solar oven, should do a little research. 🤔
@404zzz @mur2501 They are very efficient, just a box with a glass some reflective paint/mirror for more light concentration inside few wood plates. simple isolation materials can be added for more efficiency. some bakers do bread on more finished on on wheels, tracted by bicycle in North of France (where sky is often covered by clouds). allowing to distribute bread on little villages. Some solar oven use instead a parabolic mirror to concentrate light in the middle.
https://en.wikipedia.org/wiki/Solar_cooker
https://en.wikipedia.org/wiki/Solar_cooker
I see ... 🤔 Thank you for the info!
I know we use firewood too.
@404zzz
You r now an environment killer 
We don't cut trees you dumbass. We have a piece of land we go there to bring in dry wood from small dead trees.
Unlike you Mumbai cunts 👀
Unlike you Mumbai cunts 👀
