Rare plants, and cultivating (not a pun) biological diversity. For example, there are hundreds of varieties of tomato. There are wild tomatoes from the Andes

Rare plants, and cultivating (not a pun) biological diversity. For example, there are hundreds of varieties of tomato. There are wild tomatoes from the Andes Mountains to the Everglades. There are thousands of varieties of brassica (a huge genus of plants that includes bok choy, broccoli, cauliflower, cabbage, kohlrabi, cabbage, rutabaga, and turnip, etc.) I was just hearing from the proprietor of a seed company that many of the old guard are retiring and some are having trouble finding people to carry the torch.