> Scattered excrement can cause bacterial infections in cows. And when their poop mixes with pee, it creates an environmental hazard: ammonia, which can transform into the potent greenhouse gas nitrous oxide. Half of the ammonia produced in Europe comes from cattle farms, says study co-author Jan Langbein, an applied ethologist at the Leibniz Institute for Farm Animal Biology. Given the hundreds of millions of dairy cows in the world, he says, studies have shown that capturing 80% of cow urine would lead to a 56% reduction in ammonia emissions.
Walking on grates wearing shoes is one thing. Walking on grates wearing hooves is something else entirely. Especially if you want to make the holes big enough for cow patties - which are high in fiber - to fall through.
In fact there's a device for letting cars through but not cows that is basically a grate you put on the road. The fence comes up to the grate on both sides and there is no gate. You just drive over the grate.
How would toilet training reduce greenhouse gases?