Answer:
<h2>Exposure to radiation and toxins.</h2>
Explanation:
According to experts, over the recent years, male infertility has grown because of environmental variables, health and lifestyle habits. Moreover, men's fertility is most probably affected by extreme exposure to heat, radiation and chemical substances as pesticides. Constantly wearing tight pants in hot climates, and being expose to micro waves or intense ultraviolet rays from the sun, constituted the most common examples, but these recent years has been found that radio signals, like smartphones affects too.
In this order, the temperature of the testes have to be 35 degrees, that's only to degrees below body temperature! Increasing this temperature affects drastically spermatogenesis, having as a result, not enough quantity to fertilize the ovum, which is
