The vegetation on the island varies with the topography, and the climate within the island. Not threatened 29 Insufficiently known 113 Among these are seven species of rare trees which are in the International RED DATE BOOK, meaning they are threatened with extinction. It is also reported that the major tree species on the island in terms of quantity is Croton socotranus which is only found in Socotra. These days, however, the vegetation of Socotra Island is facing several problems caused by grazing, cutting for building material, firewood etc. When this tree dominates the mountain plateaus, as is the case in some parts of the Moomi Plateau, it is an indication of overgrazing.
Fishing is the most important industry for the population of the island.
There is no fish processing equipments on the island. Therefore any surplus fish is exported to the mainland. There is no organized trading in fish. Trade depends on businessmen coming from the mainland since the local people own no big boats to export their fish. Since methods are primitive, the fishermen catch less than they could have done if they were more modernly equipped, so for the moment, overfishing is not a threat.