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

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.