As OP of this thread I don't really understand why you saw in my post a bashing tone. The Moderator intervened because my post was off topic and not because of other reasons.Well, my comment was directed at the original bashing tone that was coming out at the start of this thread, that has since been edited/toned down. Discussing with calm is always good though.
I don't think the jury has settled the issue yet - still some debate going back and forth... As to whether its man caused, partial mix, or if its the normal ebb and flow of earth cycles (and man is unable to influence it). But what I do know, is that we can act prudently when and where we can.