what is the main disadvantage of the slash and burn method of growing crops
Slash-and-burn Slash-and-burn is used by 200â€“500 million people worldwide.[2][3] In 2004 it was estimated that in Brazil alone, 500,000 small farmers each cleared an average of one hectare (2.47105 acres) of forest per year[4]. The technique is not scalable or sustainable for large human populations. Methods such as Inga alley farming have been proposed[5] as alternatives which would cause less environmental degradation.[6]