With fewer droppings to mine, and the discovery of artificial fertilizer, the guano boom went bust.

随着可开采鸟粪数量的减少以及人工合成肥料的诞生，鸟粪狂潮最终破产了。

Humanity has the necessary agro-technological tools to eradicate hunger, from genetically engineered crops to artificial fertilizers.

人类已经拥有了从转基因作物到人工肥料的各种必要农业技术工具来消除饥饿。