一旦种植的想法传播开来，非洲人就开始培育他们自己的农作物，例如某些品种的水稻，他们对新进口的作物表现出持续的接受能力。
Once the idea of planting diffused, Africans began to develop their own crops, such as certain varieties of rice, and they demonstrated a continued receptiveness to new imports.
第二个途径致力于不致使农作物干旱，比如培育新物种，转基因农作物，既抗旱又高产的。
A second route focuses on making farming less thirsty-for instance by growing newly bred, perhaps genetically modified, crops that are drought-resistant or higher-yielding.
是否能依靠更加先进的生物燃料(比如利用非食物农作物或者利用农作物的纤维素部分、甚至利用柳枝稷或者海藻这些非食物作物来制造生物燃料)来解决上述这些问题还是个未知数。
Those problems might or might not be solved by more advanced biofuels, such as those made from the non-food or cellulosic parts of crop plants or even non-food crops such as switchgrass or algae.
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