Environmental factors are chemicals released into the environment due to human production and living activities that affect the endocrine system of humans and animals, with estrogen-like effects, academically known as “exogenous endocrine disruptors”. Global environmental pollution is the main cause of sperm quality decline, environmental factors affecting sperm quality include: 1, organic substances Many organic substances are toxic to sperm, such as benzene, formaldehyde, food additives, cosmetics and other harmful chemicals can hinder the production and vitality of sperm, and even lead to testicular atrophy. 2, gas (car exhaust), “white pollution” is also the culprit of male infertility. Studies have found that nitric oxide and lead in car exhaust are most likely to destroy sperm quality, and some heavy metals such as lead, mercury and cadmium in exhaust fumes are also big enemies of sperm production. In addition to this, “white pollution” can also have a great impact on male fertility. If you use plastic lunchboxes to heat food or hot food, it will produce estrogen-like hormones that disrupt hormone secretion, inhibit libido and affect the sperm production function of the testicles. 3, pesticides and drugs With the development of agriculture, the impact of pesticides on sperm quality has received increasing attention, such as dichlorvos, malathion, methylene blue, indocyanine red, etc. can affect the motility of sperm, so that the number of sperm is reduced and the morphology is changed. 4, metal elements have been proven to be toxic to reproduction of metals such as mercury, lead, cadmium, etc.. Long-term exposure to these heavy metals can lead to a decrease in the number of sperm, a decrease in sperm density, a decrease in sperm motility, a decrease in the volume of sperm discharge and an increase in the proportion of deformed sperm. 5, radiation Reproductive cells are one of the most sensitive cells to radiation, excessive radiation can have adverse effects on sperm. Electromagnetic waves, nuclear radiation, X-ray exposure are killers of human sperm, which can cause abnormal sperm cells, miscarriage in pregnant women and poor fetal development.