A 2009 article in the Worldwatch Institute magazine by authors Robert Goodland and Jeff Anhang, then employed at the World Bank, claimed that the FAO report was too conservative and that livestock sector accounts for much more of global GHG emissions, at least 51%, taking into account animal respiration and photosynthetic capacity of the land used for feeding and housing livestock.[5][6] A 2011 response to this was published by FAO and an international coalition of scientists, discrediting the magazine article and upholding the 2006 assessment.[7][8] But this response was fully answered back in the journal Animal Feed Science and Technology (AFST), and they reiterated their estimate while FAO scientists declined to continue the debate despite AFST's Editor's invitation.[9] In 2013 FAO publicly partnered with International Meat Secretariat and the International Dairy Federation[10] and many of the same authors of the first report published a subsequent (2013) study for the FAO, revising their estimate of anthropogenic greenhouse gas emissions due to livestock downward to 14.5%[11][12] without addressing any of the alleged errors pointed out in Goodland and Anhang's report or in the ensuing peer-reviewed debate.