# What seaweed and cow burps have to do with climate change | Ermias Kebreab

An episode of [TED Talks Science and Medicine](https://invisiblenetwork.ai/podcast/470623801), 3 Mar 2022, 9:09.

Audio: https://download.ted.com/products/146954.mp4?apikey=172BB350-0011

Scientists have long known that cows are a huge source of the greenhouse gas methane, contributing up to four percent of emissions globally. But could there be a way to make cattle less -- ahem -- gassy? Animal scientist Ermias Kebreab talks through an ingenious solution to reduce methane-rich cow burps by feeding cattle something growing below the surface of the ocean: seaweed.

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