He says it is true that such crops can have higher output with less cost,but added: No one knows the consequences that will have on soil fertility and the human body.

VOA: special.2010.05.18

"It is complex difficult terrain, both the land and the people, it is a tribal society with a culture vastly different from what most of us are familiar with and it varies around the country, so you cannot assume what is true in one province is true in another,".

VOA: standard.2009.10.01