The next step in saving the planet is clean cow technology. The Washington Post reports on a food additive being tested by DSM that interferes with rumen fermentation resulting in a 30% reduction in methane from burping. The byproduct may be increased weight gain on the same food intake. A food additive that increases efficiency of food conversion ought to be a big deal. The doubtful benefits of saving the planet seem to outweigh the tangible benefits.