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Neither of those statements is true. Methane is not a worse source of overall warming than CO2 (which I assume is what you were trying to say). And methane does not come mostly from cows. These facts are trivially searchable.

Livestock methane is definitely a significant concern, but it is not helpful to use exaggerated claims to make that case.

Methane is a hydrocarbon. It's carbon and hydrogen.

Better reference than Netflix?

It’s an interesting watch if you’ve not seen it. It’s about how no one dares even talk about methane being an issue because of pressure from the meat industry.

The book “The Carbon Farming Solution” is a really good reference. Methane is a problem, sure, but land use and a food system that is heavily reliant on petrochemicals (from fertilizer to transportation) is the real, systemic issue.

We need research into perennial crops (which require less petrochemical inputs and sequester more carbon) so we can start moving away from annual crops, which convert forested land into crop land, mainly to produce animal feed.

This can go a long way, but isn’t enough on its own — we still need to transform energy production and transportation as well.