By The Editors We all know something about the carbon footprint, a little less about the plastic footprint, and — may be we haven’t heard (yet) about the foodprint. What is the foodprint?  It’s all related to methane. Methane is a colorless, odorless gas with a wide distribution in nature. It is the principal component of natural gas. National Geographic calls it the “Good Gas, Bad Gas” and it goes on to say: “Burn natural gas and it warms your house. But let it leak, from fracked wells or the melting Arctic, and it warms the whole planet.”  To this, we can add:that, globally, over 60% of total methane emissions come from human activities. Methane…