What was not known at the time , however , was ddt 's propensity to accumulate , persist and damage the environment .
然而在那时没有人知道，滴滴涕有富集性，稳定性并且破坏环境。
Assessing ecological risks of ddt and lindane to freshwater organisms by species sensitivity distributions .
应用物种敏感性分布评估ddt和林丹对淡水生物的生态风险。
However , as early as the 1940s scientists had begun expressing concern over hazards associated with the use of ddt , and extensive research has since implicated the organochlorine insecticide in the poisoning of humans , animals and the environment .
Three months later , after reviewing dozens of studies , a panel of experts told the world health organization that " cell phones may cause brain cancer , " putting them in the same category at engine exhaust and ddt .
Conclusion the tested wild strains had resistances to all 3 kinds of insecticides but their resistance factors to ddt were close to the normal strain .
