Sperm count in the west halved in past 50 years

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http://www.independent.co.uk/news/science/sperm-count-west-men-health-drop-60-per-cent-years-modern-life-a7859491.html
>Pesticides, hormone-disrupting chemicals, diet, stress, smoking and obesity have all been suggested as possible reasons behind the dramatic declines but experts say more research is urgently needed

https://www.theguardian.com/lifeandstyle/2017/jul/25/sperm-counts-among-western-men-have-halved-in-last-40-years-study
>The latest findings reveal that between 1973 and 2011, the concentration of sperm in the ejaculate of men in western countries has fallen by an average of 1.4% a year, leading to an overall drop of just over 52%.


what happens in the next fifty years? Why is this happening? This seems like an extremely urgent issue