Nature and EnvironmentMalawians swap tobacco for sunflowers05/02/2017May 2, 2017Tobacco - or "green gold"- is Malawi's most important export product. But monocultures are harming soil fertility. Switching to other crops, such as sunflowers, could help. Copy linkImage: DWAdvertisementMalawians swap tobacco for sunflowers04:18This browser does not support the video element.