Why? Jungle is intended to be a completely useless terrain.
in b4 global warming, environmentalism, national park.
okay firstly, jungle in india (the original birthplace of the word) means something different, it means something akin to non-managed land..
but going by say the brazillian definition of 'selva'...
the amount of 'hammers' a real jungle can produce is absolutely amazing.
Tropical hardwoods such as mahagony and teak are in huge demand, they have found a wide range of applications, and realistically speaking, the amount of 'wood' available from 1 square kilometre in the tropics must be much higher than available in 1 sq km of temperate climates....certainly the bio-activity is order of magnitudes larger in a tropical rainforest..
if anything, the 'jungle' terrain bonuses are indicative of a euro-centric mentality.
after all people who had newly discovered jungles would find them immediately less useful than their own native forests, but in reality jungles are more likely to provide food and sustenance for someone then a temperate climate forest....
how many times has someone been in a forest and not heard a thing?
go into a jungle/rainforest, and you'll be lucky not to have something trying to slither onto you within a minute..