The biggest headache now... 目前最严重的问题是

341. Pesticides, another gift of the petrochemical revolution,
     杀虫剂 石油化工革命的另一产物
342. Exterminated them.
     杀死害虫
343. Bad harvests and famine became a distant memory.
     歉收与饥荒成为遥远的回忆
344. The biggest headache now...
     目前最严重的问题是
345. Was what to do with the surpluses engendered by modern agriculture.
     如何处理现代农业带来的过剩盈余
346. But toxic pesticides seeped into the air,
     但毒性杀虫剂渗入空气
347. Soil, plants, animals, rivers and oceans.
     土壤 植物 动物 河流和海洋

来自《家园 第一部分 Home Part1》第 344 行