We've been trying to find ways to discover truth for much much longer than we've been looking for pollution. I think consensus is that there are some things tha

We've been trying to find ways to discover truth for much much longer than we've been looking for pollution. I think consensus is that there are some things that are unprovable - e.g., the existence of a god. We know with a high degree of certainty, thanks to Kurt Godel and others, that there are things that cannot be proven.