From the article:
We have a study of young men in Rochester, New York. College students. And they filled out a really detailed food frequency questionnaire about what they ate in the last 24 hours and what they usually ate, and so on. And then we looked at how they answered on that food frequency questionnaire and related it to their semen quality. Men could improve their semen quality by eating more fruit and vegetables—as long as they had low pesticide residue.
There is more on plastics, phtalates and BPA for example. All these products are increasingly present higher up the food chain because they enter through the mouth but don’t leave.