柴油車的廢氣除了被WHO列為2A級極可能致癌物，還可能造成男性不孕。
丹麥的研究發現，柴油廢氣會造成公老鼠精子數量減少，可能跟不孕症有關
文章出處
Diesel exhaust reduces sperm production in mice exposed before birth.
https://is.gd/c8YrGx
暴露在類柴油廢氣的懷孕母鼠，它的下一代公鼠體內的精子數量會比一般公鼠少，
Sperm counts are lower in mice whose mothers were exposed during pregnancy
to a mixture of particles found in diesel exhaust.
這項研究顯示柴油廢氣可能會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.
(圖) 幾種生物的精子形狀，從左至右分別是 文昌魚、雞、老鼠、人類、青蛙、兩棲鯢
http://i.imgur.com/JChlfFJ.jpg