> Note however that US academic institutions basically cut all research into these subjects due to political and industrial pressure. It started with Republican

> Note however that US academic institutions basically cut all research into these subjects due to political and industrial pressure. It started with Republican attacks on USGS funding for environmental pollution research in the early 1990s, and continued with NIH cutting funding for environmental carcinogen research in favor of inheritied genetic explanations for cancer. Hence, 'little firm evidence'. Thank you. I’ve been saying this for more than three decades. It’s nice to know people are finally getting on board. Younger people might forget that Republicans were at one time deeply invested in conservation and protecting the environment.