… of the Yale Initiative on Sustainable Finance . Professor Esty has written or edited fourteen books (including the prizewinning volumes Green to Gold and A Better Planet) and … of the Yale Initiative on Sustainable Finance . Professor Esty has written or edited fourteen books (including the prizewinning volumes Green to Gold and A Better Planet) and … of the Yale Initiative on Sustainable Finance . Professor Esty has written or edited fourteen books (including the prizewinning volumes Green to Gold and A Better Planet) and …