I agree it won't be easy and it is absolutely necessary. Working in the "food" (chemical) industry I have seen our standards change in the few years I have been here. I often wonder if my older coworkers, who have been with the company for decades, will make it to or be able to enjoy their retirement. They speak often of the way they used to "test" some chemicals for their quality-by sniffing them. Some of those chemicals are now known carcinogens with long-term accumulating affects akin to asbestos exposure.
More intensive study is being done in the prenatal environment. I enjoy the works of Dan Agin, who is a good authority on this topic. He's not jumping off any buildings, but much caution is warranted. The precautionary principle would be good advice. I see a big fight coming in this arena from chemical industries akin to what we've seen from tobacco and oil when science lined up firmly against them. Disinformation is a business at this point.