If we feed enough oregano to our cows, can we prevent floods?

Researchers alter cow diets to help environment

And methane, a greenhouse gas that is blamed for global warming, comes out the cow's front end - through belching.

Once again, the Penn State team is trying to address the issue through diet. One feed additive that has shown early promise might seem more at home in a good marinara sauce: oregano.

In a small group of cows that ate food seasoned with the herb, methane emissions declined by 40 percent - though Hristov cautioned that he must repeat the experiment to make sure it wasn't a fluke.