When we meet and work with farmers from all over the world, they all give us the same message: having better access to crop and varietal diversity helps them to adapt to climate change. Under supportive policy and socioeconomic conditions, such strengthened adaptive capacity can contribute to greater food availability throughout the year, with more nutritious and healthy crops, and income generation. 

This 2nd edition of the handbook is a tool that supports research on resilient seed systems in the context of adaptation to climate change. Climate and crop modeling tools are increasingly used to project the adaptive capacity of a given crop to the expected changes in climate. Several of these tools are included in the handbook.