The sperm count is rapidly declining and researchers believe that environmental factors are present in the game. Tony Spitz's got the details.

The last problem being linked to global warming: male sperm is considered.

This is not good news. According to a NEW YORK (Reuters Health) – Male fertility is decreasing as temperatures soar, a new study released on Tuesday showed. The study showed "clear evidence" that stress from heat waves reduces "seed number and viability" bugs.

Yes, scientists used beetles to test their theory. But researchers say insects can be used as a protocol for people.

Beetles are one of the most common species on the planet, so these results are very important for understanding how species respond to climate change.

Heat waves are expected to be more frequent and more extreme in this century as a result of man-made climate change.

"Studies have also shown that heat shock can damage male reproduction in too hot blood cells, and past work has shown that this leads to fertility in mammals," added lead author Kirs Sales, also of the University of East Anglia.

"Our research shows that hot flashes divide male reproductive capacity, and it was surprising how much the effect was," he added.

In human males, the testes produce sperm, and to do so, testicular temperature should be cooler than within the body, according to the University of Rochester Medical Center.

In a study published on Tuesday, researchers found that hot flashes (9 to 13 degrees above the high temperature typical of five days) hurt masculinity, but not breeding, heat waves reduce male productivity and sperm competitiveness, and hot flashes almost follow male sterilizers.

In addition, the descendants of fathers who experienced the heat lived a shorter life.

"When it comes to heat waves and reproduction, the males can not stand it," Sales concluded.

The study was published in Nature Communications, a peer-reviewed British journal.

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