Of the Clean Development Mechanism projects that exist in Mexico, methane destruction from hog farms dominates the landscape with 56% of the projects developed and 49% of the certified emission reductions that will be generated within the country by 2012. These biodigesters, however, have experienced many technical difficulties that place their future viability and continued development in question. Because of these challenges, future methane capture in the country may focus around other agro industries or land fills. (C) 2008 Elsevier Ltd. All rights reserved.