Reuters: Seed banks need a further $250 million to preserve all varieties of food crops including those which may best survive future climate changes, the Global Crop Diversity Trust said Wednesday. The crop trust is the main supporter of a seed vault in the Arctic archipelago of Svalbard, intended as a global back-up for food crops, and says it needs more money to complete that project and support other, more accessible seed banks worldwide. "The reality is that this is a resource …