Even better, kangaroos (I know, I know, poor skippy...). Their digestive systems don't produce methane: https://en.wikipedia.org/wiki/Kangaroo#Absence_of_digestive_...

And I'm less sure of this, but I've heard that they cause far less soil erosion compared to cows, as their weight is spread out over a much larger area (i.e. they have big feet). Their populations in some parts of Australia have also reached unsustainable starvation levels, to the point where some State-level governments have initiated culling (i.e. licensed shooting of kangaroos, in a country with very tight gun-control laws).

Or how about not eating animals at all, since it's cruel and unnecessary altogether? Difficult mental and emotional leap for most people, I know.

Or at least, we should teach butchery to kids. That way, they'd know what it means to actually kill to eat. The only thing I've ever killed is a lobster, and it helps a lot to relate to what you have on your plate...