Irans leading export is in energy sector. Firstly Oil, then Gas
islam
the national tree is an elm tree
Switzerland does not have an official national tree.
rials
The national tree of Greece is the olive tree.
I believe that the pine tree is the national Christmas tree.
India's national tree is the banyan tree
the canadien national tree is the maple tree
The national tree of Yemen is the the Dragon Blood.
The birch tree is considered Russia's national tree.
Chile does not have a national tree, but a national flower, the "copihue".