All of the Comoros islands are volcanic in origin. Njazidja, the largest island, has an active volcano at Mt. Kartala. The terrain varies in the interior of the islands from steep mountains to low hills. It is covered with low hills and fertile valleys. Climate is tropical marine with a rainy season.
Coastal areas are extremely hot and humid.
The interior regions are somewhat cooler. Although almost half the total land area is being cultivated, over 50 percent of the country s food requirements are imported. The islands have a wealth of fishing resources, especially tuna. The tourism industry has been developing. Comoros is the world s largest producer of ylang-ylang, which is used to make perfume.