Question

writes a notes on: (a) smokeless chulha(b) solar cooker (c) Gobar gas​

Answer 1

${\huge{\underline{\large{\mathbb{\green{VERIFIED \: ANSWER}}}}}}$

1. A chulha is a smokeless stove and a low-tech solution for indoor cooking. Chulhas are made entirely from local materials and can still use indigenous biomass as fuel. Formed with mud, chulha are reinforced with coconut husk or dried grass. After drying this material becomes as strong as concrete
2. Solar cooker is a device for the preparation of food by concentrating solar radiation on the food to be cooked. It consists of a box made of non-conducting materials like plastics, fiber glass or wood. The walls of the box are made thick so as to minimize loss of heat due to radiation.
3. Biogas is the mixture of gases produced by organic matter in the absence of oxygen (anaerobically), primarily consisting of methane and carbon dioxide. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste.