Cattle play a colossal role in climate change: As the single largest agricultural source of methane, a potent planet-warming gas, the world’s 940 million cows spew nearly 10% of all greenhouse gas emissions — much of it through belches and droppings.
As such, there’s an astonishing amount of time and money being funneled into emission control. On-farm biodigesters, for example, take a back-end approach by harvesting methane wafting from manure pits. A slew of research aims to curb bovine burps by feeding them seaweed, essential oilsand even a bovine Bean-O of sorts. The latest endeavor, a $70 million effort led by a Nobel laureate, uses gene-editing technology in an effort to eliminate that pollution by re-engineering the animals’ gut microbes.
