That's the thing, I could use the same argument to believe in "god" by saying that priest spend their entire lives studying the matter so I should believe them when they say it exists. Yet I'm an atheist. You see where I'm getting at right?
My entire take on this is that we should really do something about it. Specially since, in the chance they're actually right we'd be both saving the world and improving people's health. Going around in a city with smog is very bad for your lungs.
Edit: Though screwing over the mental health of an entire generation over it might defeat the purpose of "saving the world" or "saving humanity".