As part of its plan to reduce U.S. greenhouse gas emissions, the Obama administration is targeting the dairy industry to reduce methane emissions in their operations. This comes despite falling methane emission levels across the economy since 1990. The White House has proposed cutting methane emissions from the dairy industry by 25 percent by 2020. Although U.S. agriculture only accounts for about 9 percent of the country’s greenhouse gas emissions, according to the Environmental Protection Agency, it makes up a sizeableportion of methane emissions — which is a very potent greenhouse gas. Some of these methane emissions come from cow...