Yes, we indeed have a strong and clearly noticeable impact in the ecosystem, but I find that normal because as our intelligence grows, so does the complexity of the systems we created, and so far the only way to power those system has been to using means that can end up contaminating a little bit (or a lot depending how you look at it).

But this is an issue that will eventually be resolved as we get more and more efficient ways of powering our civilization. So there will come a day in which we can finally say we are not contaminating or damaging animals with our activities.