Here’s a better way to dispose of used cooking oil

Photograph by Rebecca Hale via National Geographic

Don’t pour used cooking oil down the drain. Those oils can damage your home’s pipes and build up in municipal sewers. Oil and fats act as a glue, holding assorted sewer detritus together to create fatbergs, causing backups that require costly manual removal.

Commercially marketed “oil solidifiers” – or a household substance called stearic acid – can transform the oil into a congealed disk for easier disposal in the trash, says sustainability expert Kris Bordessa.

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