End of the line

时间:2019-03-06 08:03:01166网络整理admin

By Sylvia Pagán Westphal in Boston TOXIC chemicals in exhaust fumes and cigarette smoke can bring on the menopause. Research published this week shows that polycyclic aromatic hydrocarbons, or PAHs, trigger the death of egg cells in women’s ovaries. Tens of thousands of tonnes of these PAHs, which also cause cancer, are released into the air each year (New Scientist, 10 April 1999, p 14). “The fact that these chemicals, which are ubiquitous in the environment, have these effects is worrying,