How many times does the Earth have to be destroyed by global warming?

It has never happened so I'll say zero.

Five times

Once . 5 Billion years from now when the Sun shifts into a red giant .

The only way that global warming will destroy Earth is when the Sun becomes a red giant and engulfs Earth. Other than that, Venus and Mercury areare both much hotter than Earth and are doing fine. They just can't support life.

In 5 billion years, our sun will likely turn to the Red Giant and destroy the earth. Our CO2 emissions obviously aren't going to destroy the planet. Assuming that it could, it could only do it once except on Groundhog Day.

Global warming has come and gone hundreds of times in the past 4 billion years. The temp will continue to get warm for about, roughly, one hundred years before a cooling trend begins. A tip of the axis, prox 2 to 3 degrees every 26,000 years or so.

Earth has survived far worse than that, but humans won't be as lucky.

OR global freezing. Yes, those dinosaurs drove such HUGE cars----

It hasn't been destroyed so probably just once

Not going to happen.

50 million years ago during the Eocene the world was 15 degrees C hotter, and life was not destroyed.

We might not have been around then but mammals were.