To varying degrees, many in the environmental movement are deeply concerned about global warming.  But few have gone as far as those in New Zealand who are having a cow, quite literally, over how to combat it.  According to CNSNews, the center-left government is proposing that ranchers pay a levy on the flatulence released by their livestock which it believes is dangerously warming the planet.  Ranchers, as might be expected, aren’t amused – and argue that this unique gas tax is going to make their products less competitive internationally. But with environmentalists claiming that the average New Zealand cow produces 90 kilograms of planet killing methane each year, it’s unlikely this stink about a flatulence tax will waft away anytime soon.