Do They Make Cow Mints?

Here's a "Why didn't I think of that?" story: Researchers in the Netherlands have begun feeding garlic to cows as a means of reducing global carbon emissions. 

Cows produce some 17% of the world's carbon output, by way of... um... flatulence, and this neat trick has been shown to reduce their gaseous effluence by 15%. I don't really want to know how the researchers measured the stuff, but there you have it. 

Now, to figure a way to get garlic into the diets of a couple of guys at the gym...