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Pronunciation:  bI-pro-dukt
Definition :Something produced in a process that is a secondary and sometimes unexpected or unintended result.
Facts: Many by-products of the cattle industry are highly valued, such as leather and dog food.

Industries have created ways to use many (formerly) unusable by-products, such as turning sawdust and wood chips into pressboard and oriented strand board (OSB) used as building supplies.

Some by-products are toxic to the environment.