A secret weapon to curb global warming even faster than cutting carbon emissions from fossil fuels is lying — and chewing — in plain sight: the cows. Don’t be fooled by their peaceful manner. They are heating up the climate with every breath, belch, fart and poop — but especially breath. The good news is, researchers around the world are working on ways to reduce methane emissions from cows. The stakes are high because methane is a far more potent greenhouse gas than carbon dioxid...
