This is a guest post by Heidi Wittmer from Helmholtz Cen­tre for Envi­ron­men­tal Research in Ger­many. This com­ment is the expres­sion of the author’s thoughts and expe­ri­ences and such is acknowl­edged as a fruit­ful con­tri­bu­tion to the dis­cus­sion on bio­di­ver­sity off­sets. If … Con­tinue read­ing →