"Of course, there are a lot. Lead causes cancer and other things we saw when I did my research. The impact is not only on animals. We eat fish and we accumulate this in our bodies. When you take a fish that has been exposed to lead, some of those things will be in its flesh and liver and when you eat it, you are also being exposed to lead. So, whatever we push into the environment eventually comes back to us because we are higher animals but it takes longer for those effects to manifest in us because of our body mass and all that."