I'm not worried. The 2nd or 3rd graf specifically says the event has happened before, after showing their bias earlier by claiming a current climate crisis. All one needs is a basic refresher of grammar school science to know that the world has been MUCH warmer before Joe Six Pack drove his Hummer to the market for groceries.
Very true. It’s not about Earth itself, it’s about how it will affect us. Earth has been here all along. She can take anything thrown at her literally, it’s the beings on her that can’t.
It’s true the climate has varied a lot historically, but the current concern is more about how fast the change is happening and the potential impact.