There are many explanations from experts why Vietnam has the abundance in kinds of plants and trees and the rich genetic biodiversity. This abundance is due to many different factors. Firstly, Vietnam is a tropical country with the advantageous climate for tree development. There is no desert in Vietnam although areas in Ninh Thuan are extremely dry. Besides, in ancient times, many species were able to survive in Vietnam and were not driven away by the cold frost that dominated Northern and southern climes.