Methane is a natural byproduct of cattle digestion, meaning it is emitted into the atmosphere every time a beef or dairy cow burps or passes gas. And unlike in oil and gas -- where existing leak detection and repair technology can go a long way toward reducing methane emissions -- there is no obvious solution for the problem yet.

https://www.ctvnews.ca/climate-and-environment/beef-a-bigger-challenge-than-oil-and-gas-when-it-comes-to-tackling-methane-emissions-1.5640382