What is the difference between permanent and shifting agriculture?
discuss the costs and benefits of both.

Shifting Cultivation. ... The major difference between the slash-and-burn system and shifting cultivation is in the length of time for which the land is used for agriculture. In the slash-and-burn system, the conversion is long-term, often permanent. Shifting cultivation is a more ephemeral use of the land for cultivation.

Nation of conflicting ethnic groups

Answeroil-shale;