By offering food , other help to encourage Afghan farmers to grow wheat . Watch Afghans speak about the change in their farming practices » . By trying to wean Afghan ##s from poppy production . Poppy is used to produce opium and heroin . Historically , heroin has been a major source of revenue for the Taliban .
By offering food , other help to encourage Afghan farmers to grow wheat . By trying to wean Afghan ##s from poppy production . Poppy is used to produce opium and heroin . Historically , heroin has been a major source of revenue for the Taliban .