english: When we burn and plow the Amazon rain forest so that we can have cheap land for ranching, when the last of the African bush gets converted to farms, when wild animals in China are hunted to extinction, human beings come into contact with wildlife populations that they've never come into contact with before, and those populations have new kinds of diseases: bacteria, viruses, stuff we're not ready for.
non_english: Ko požigamo in orjemo amazonski deževni gozd, da dobimo poceni zemljo za kmetovanje; ko zadnjo afriško goščavo spreminjamo v kmetije; ko do izumrtja lovimo divje živali na Kitajskem, prihajajo ljudje v stik s populacijo divjine, s katero še nikoli prej  niso prišli v stik. In te populacije imajo nove vrste bolezni, bakterije, viruse, stvari, na katere nismo pripravljeni.