1) you stated your opinion as a fact. There is some research to point to shorter life expectancy but stating it as a fact that will happen no matter what seems a little strong.

2) you state that life expectancy will "plummet". Plummet indicates a very large dropoff. From what I've seen, some respected paper suggest that life expectancy might dip by a year or so.

But to have a say 10 year drop, which is what plummet would indicate seems rash as no credible scientists are predicting that.