MainStreet: There's a huge contributor to climate change that gets ignored when talking about our warming world -- and it isn't coal or cars . Rather, it's what we most of us eat on a daily or near daily basis -- namely, meat and milk . Read More: Carbon Tax Gains Steam to Fight Global Warming In 2006, the Food and Agricultural Organization of the United Nations released a lengthy report entitled "Livestock's Long Shadow." Among the array of environmental problems the livestock industry is accused of contributing...