If ours were a preindustrial , primarily agricultural society , extreme climate change would be obviously catastrophic .
如果我们是处于前工业化的初级农业社会，极端的气候变化将会是灾难性的。
For ages , disturbing dreams have been a source of discussion , fascination , and concern , the handiwork , many preindustrial europeans came to believe , of satanic spirits .
The burning of fossil fuels has been one reason for an increase of co2 levels in the atmosphere to around 395 ppm ( or parts per million ) , up from preindustrial levels of about 280 ppm .
New research shows that , at least for the sami people of preindustrial finland , men should marry a woman almost 15 years their junior to maximize their chances of having the most offspring that survive .
It is impossible to know today just what our stone age ancestors knew about plants , but from what we can observe of preindustrial societies that still exist a detailed learning of plants and their properties must be extremely ancient .
