Australia has the largest wild camel population in the world. An estimated 1.2 million camels roam the deserts. Each camel blurts up to 45kg of methane gas into the atmosphere every year, totalling 5.4 million kg in total.
This does not include feral pigs, bufflo, donkeys, brumbies, and other introduced animals gone feral.
The Australian government is thinking of sending shooters into the hinterland to gain carbon credits in shooting out the camel population.
Maybe they should put a carbon tax on Old Men's homes as well.