Yeast is a living organism used in baking bread and brewing beer. It was an ancient ingredient used in Egyptian cuisine. Some people are sensitive to the lactose and bacteria naturally found in milk. Louis Pasteur discovered that bacteria causes food spoilage when food is heated in an uncontrolled environment. Drinking contaminated water can spread illnesses, and chlorine can help remove bacteria. While most industrial waste is non-toxic, industries like mills and factories produce waste. Sewage bacteria can help clean water but also pollute it, and treating sewage is a long mechanical process.
3. Without yeast we wouldn’t be able to make things like bread and beer.DID YOU KNOW? Yeast was an old Egyptian ingredient used for making different cultural food.
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9. The process of cleaning out the Bacteria produced by sewerage is long and quite mechanical.
![Baking Yeast ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)