In Cameroon’s port city of Douala, most used cooking oil from hotels and restaurants was once dumped down the drain, where it fouled up plumbing systems and caused pollution. A Cameroonian chemist decided to use his knowledge to change that practice and makes soap and detergents. He says the idea of recycling used cooking oil came when a hotel made the request after realizing that it produced huge quantities of used oil. At the time, the used cooking oil was discharged into nature. It’s now a business that produces 165 kilograms of soap and two tons of liquid detergent per month. Environmental scientists say oil waste clogs up sewers and drains, pollutes the environment, and can harm wildlife. Recycling the oil reduces toxic pollution and creates a new and valued product.

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