It is a combination of field equipment that use as little fuel as possible and yet provides many of the conveniences of a regular kitchen including well cooked meals. It will function for months or years under adverse conditions. In sunny areas, the heart of a sustainable kitchen is the Solar Cooker. It includes some long term method of starting fires, such as flint and steel since a supply of matches may be exhausted. In addition, the sustainable kitchen may include water heaters as well as food drying capacity.
Cooking is done by sunlight falling on dark surfaces and changing to heat.
The heat is trapped around the pot and flows into the food that becomes gently yet thoroughly cooked. A solar cooker uses free energy delivered to your yard every sunny day. The domestic solar designs are safe due to the materials and design used in construction coupled with the low operating temperatures. It is clearly safer and cheaper when compared to gas, electric, propane, or kerosene or wood. There is no smoke or pollution using a solar cooker.