"A government-appointed group of top nutrition experts, assigned to lay the scientific groundwork for a new version of the nation's dietary guidelines, decided earlier this year to collect data on the environmental implication of different food choices.

Congress now has slapped them down.

Lawmakers attached a list of "congressional directives" to a massive spending bill that was passed by both the House and the Senate in recent days. One of those directives expresses "concern" that the Dietary Guidelines Advisory Committee "is showing an interest in incorporating agriculture production practices and environmental factors" into their recommendations, and directs the Obama administration to ignore such factors in the next revision of the guidelines, which is due out next year."

Dan Charles reports for NPR's Morning Edition December 15, 2014. [2]