Jungle usually refers to a dense forest in a hot climate, such as a tropical rainforest. About 6% of the Earth's land mass is classified as jungle. Jungles are vital to sustaining the ecosystems of the Earth as we know it. About 57% of all species live in jungle environments (External Link). The word jungle originates from a Sanskrit word jangala, meaning "desert". In many languages of the Indian subcontinent, including Indian English, it's generally used to refer to any wild, untended or uncu… (More on Jungle)