The hamburgers and cheese that come from U.S. cattle may be favorite fare at many summer cookouts, but the methane the same cows produce is significantly less appetizing.
That's especially the case for sustainable investors looking for a low-emission place to park their cash. "Enteric fermentation," or livestock's digestive process, accounts for 22 percent of all U.S. methane emissions, and the manure they produce makes up 8 percent more, according to the U.S. Environmental Protection Agency.
