The Italian agent brought a flurry of excitement when he arrived in Kilifi County with news of a wonder-crop: castor. Diego Barili was an intermediary for Eni, Italy’s state-owned energy giant. If farmers in Kilifi, north of Kenya’s port city of Mombasa, switched to growing castor, he said, he would pay life-changing cash for plants that Eni would turn into green fuel for customers including BMW, EasyJet and Ryanair. Katsele Shauri Mitsanze was one of many who jumped at the opportunity.