Occurance:
About location, latitudinal extent
1) Mainly pracised by native tribes in hilly regions in tropical rain forest,
2) in the equatorial areas with a hot humid climate, between 5oN and 5oS.
3) Mostly found in less developed countries with TFR
For example,
- Amazon Basin in Brazil, South America --practised by the Amerindians
- Congo Basin in Africa
- Papua New Guinea
- Thailand