A new study concludes that males of some species will become sterile because of high temperatures due to global warming.
So far, researchers have focused on temperatures that could kill organisms, not temperatures at which organisms become sterile.
The study found that out of 43 fruit fly species, the males of almost half of the species became sterile at lower than lethal temperatures...
http://researchstoryteller.com/espressoknowledge/high-temperature-male-sterility-global-warming