A recent notification on the American Egg Board monthly newsletter noted that the Egg Industry Center is evaluating results from the Life Cycle Assessment survey data representing over 100 million hens.  It is intended to update the survey that demonstrated a reduction in inputs required to produce shell eggs over the period 1960 through 2010.  Based on advances in genetics, nutrition, disease control and most recently conversion to cage-free housing, it was decided to define and quantify inputs required to produce eggs and their environmental impact with respect to carbon emission and waste.