To be fair, it is rare to find such an ecologically pure fuel. Whilst in Khynalyg, one may often notice a pile of cubes or bricks called "tezek" in Azerbaijani made of manure. In the past, this type of bio-fuel was widely used in Azerbaijan. The manure is piled up and mixed with hay, formed into special shapes and then pressed. The bricks formed are dried in the sun and then, used to build high walls. The bricks are the main fuel used by the inhabitants of Khynalyg: they are high-quality material and do not incur any additional costs.