yunus was one of 20 nobel laureates such as peter agre, nadine gordimer, yuan t. lee, elinor ostrom, werner arber, david gross, james mirrlees, carlo rubbia, paul j. crutzen, mario j. molina, amartya sen, peter doherty (scientist), walter kohn, douglass north, john sulston, murray gell-mann, harold kroto, douglas osheroff who signed the "stockholm memorandum" at the 3rd nobel laureate symposium on global sustainability in stockholm, sweden on 18 may 2011.