He means bugs. To be more precise: the genetic alteration of bug

He means bugs. To be more precise: the genetic alteration of bugs----very, very small ones----so that when they feed on agricultural waste such as woodchips or wheat straw, they do something extraordinary. They excrete crude oil.
【正确答案】：帕尔先生所谈的东西是细菌，更确切地说是一些转基因的极微小的细菌。当它们吃下例如木屑或麦秆这样的农业废料时，就会做出令人惊奇的事----分泌原油。