Discuss reasons for the resurgence of heirloom grape varietals, using references to support your logic.The French AOC system was created in part to...

People desire heirloom vegetables and fruits due to their
superior flavor.  Heirloom varieties have generally been developed due to their taste
and performance.  Seeds have been grown and harvested for generations in a particular
region and microclimate becomes adapted to that area. Due to a particular type of soil,
climate and seed a region can have unique flavors known only to plants grown in that
area.  While we have become a consumer-driven economy many of the unique heirloom
varieties has fallen to the more uniform, more productive varieties.  Other than for the
unique taste and marketability of an heirloom variety there is a more important reason
to save these plants.  Many varieties of plants have already disappeared. It is
imperative to keep plants that are resistant to environmental issues such as drought and
disease.