柴油车的废气除了被WHO列为2A级极可能致癌物，还可能造成男性不孕。
丹麦的研究发现，柴油废气会造成公老鼠精子数量减少，可能跟不孕症有关
文章出处
Diesel exhaust reduces sperm production in mice exposed before birth.
https://is.gd/c8YrGx
暴露在类柴油废气的怀孕母鼠，它的下一代公鼠体内的精子数量会比一般公鼠少，
Sperm counts are lower in mice whose mothers were exposed during pregnancy
to a mixture of particles found in diesel exhaust.
这项研究显示柴油废气可能会危害到男性的生育能力。
A new study with mice provides evidence that prenatal exposure to the
small particles released when diesel fuel is burned could compromise
male fertility.
(图) 几种生物的精子形状，从左至右分别是 文昌鱼、鸡、老鼠、人类、青蛙、两栖鲵
http://i.imgur.com/JChlfFJ.jpg