English to French Other General / Conversation / Greetings / Letters Humanitarian

Ce terme apparaît dans plusieurs phrases de ce rapport (intervention des ONG suite au tsunami):

Phrase 1:
"The tsunami response was driven by a unique set of circumstances, but we believe its ***legacy*** will be felt for many years to come, not only in the affected countries, but anywhere we launch an emergency response."

Phrase 2:
"The tsunami response is sure to leave a ***legacy***. The money so generously donated by the public has enabled organizations not only to implement extensive programs, but also to devote funds to research, monitoring and evaluation in ways that we would not normally be able to do."

Phrase 3:
"One long-term ***legacy*** of our tsunami work is the Advanced Center for Disaster Risk Reduction (ACEDRR). This center carries out research and develops policy relating to disaster mitigation, and builds the capacity of communities and civil society to better withstand disasters."

C'est surtout la 3ème phrase qui me pose problème car "héritage" ne me semble pas très adapté.

Merci d'avance pour votre contribution